1985 Detroit Grand Prix

The 1985 Detroit Grand Prix, otherwise known as the Detroit Grand Prix IV was the sixth race of the FIA Formula One World Championship, held on the 23 June 1985 on the Detroit Street Circuit.'United States GP, 1985', grandprix.com, (Inside F1 Inc., 2015), http://www.grandprix.com/gpe/rr410.html, (Accessed 24/03/2019) The race was won by Keke Rosberg in a , almost a minute ahead of the duo of Stefan Johansson and Michele Alboreto.
Regardless, the entry would be the same as it had been a week earlier in Canada, and would see claim pole position for the fifth straight race. This time it was Ayrton Senna who topped the time sheets, with Nigel Mansell in the #5 Williams-Honda alongside.
Senna would subsequently ace his start to sprint into the lead on raceday, while an equally impressive getaway saw Rosberg leap from fifth to second before the first corner. The rest of the field would thunder into the first corner behind Mansell, while Championship leader Alboreto dropped out of the top six after a sluggish getaway.
The opening laps suggested that the race would be dictated by tyres, with Senna's early pace soon deteriorating. That allowed Rosberg to pass with little resistance on lap eight, prompting Senna to pit at the end of the lap for fresher, and harder, Goodyears.
That left the two Williams-Hondas running one-two, while Alboreto moved through to third with an aggressive recovery drive. Yet, a few laps after moving into the top three the Italian would begin to suffer from tyre grip and wear concerns, allowing Elio de Angelis to sneak through to third.
A spin for Mansell on lap twenty would promote Alboreto back onto the podium, while de Angelis tried to catch the now out-of-sight Rosberg. Mansell, meanwhile, would rejoin just ahead of Stefan Johansson, but soon fell behind the Swede as his tyres continued to struggle.
Indeed, Mansell only lasted a few laps more until his race was ended by a spin, following Alain Prost's exit a few laps earlier. Alboreto, meanwhile, would lose more and more pace with his wearing tyres and so slipped down the order, with Martin Brundle in the lowly briefly running in third after de Angelis abandoned second for a new nose after contact with a backmarker.
Unfortunately for Brundle he would be unable to escape Alboreto's attentions when the Italian finally found some pace, with the Ferrari easing past the Tyrrell without much issue. Indeed, Brundle's glory run was to come to an end a few laps later when he smacked into Philippe Alliot, promoting teammate Stefan Bellof into fourth.
The race looked to be settled from the that point, although Rosberg almost lost the lead when he pitted on lap 50 to have his radiators cleared. Yet, he would manage to rejoin ahead of second placed Johansson and duly blasted clear, leaving the Swede in a relatively lonely second.
With that the race was largely done, barring a late accident for Senna as he tried to challenge Alboreto for third, only to put himself into the wall. Regardless, Rosberg swept home to claim a comfortable victory from Johansson and Alboreto, with Bellof, de Angelis and Nelson Piquet claiming the remaining points.
==Background==
The Detroit Grand Prix of would be heralded by news of agreeing to supply a new American entry with engines, namely the incoming squad. This new engine was to be turbocharged, with Ford again commissioning to develop the engine as a replacement for the now out-dated DFV. Indeed, while Ford had been heavily linked with the project, and had even reportedly supplied an L4 engine block, the American manufacturer were still reluctant to fully commit to an F1 project themselves, citing how expensive racing in F1 had become.
Into the Championship, and victory in Canada had propelled Michele Alboreto back into the lead, the Italian ace having moved five points clear of Alain Prost in second. Indeed, for the second weekend in succession the Frenchman had ended the afternoon level on points with the driver in third, Elio de Angelis, but was considered to be ahead having picked up two wins. A significant twelve point gap then separated them from fourth placed Patrick Tambay, while Ayrton Senna had remained in fifth.
In the Constructors Championship had dethroned in Canada, with the Scuderia's one-two in Montreal leaving them on 37 points. The Norfolk based squad, meanwhile, had moved onto 31 points, keeping them six ahead of defending Champions in third. Elsewhere had held station in fourth and had moved into fifth, with eight of F1's sixteen registered teams on the score board.
===Entry List===
The full entry list for the is outlined below:
No. 	Driver 	Entrant 	Constructor 	Chassis 	Engine 	Model 	Tyre
1 	Niki Lauda 	Marlboro McLaren International 	 	MP4/2B 	 	TTE PO1 1.5 V6t 	
2 	Alain Prost 	Marlboro McLaren International 	 	MP4/2B 	 	TTE PO1 1.5 V6t 	
3 	Martin Brundle 	Tyrrell Racing Organisation 	 	012 	 	DFY 3.0 V8 	
4 	Stefan Bellof 	Tyrrell Racing Organisation 	 	012 	 	DFY 3.0 V8 	
5 	Nigel Mansell 	Canon Williams Honda Team 	 	FW10 	 	RA165E 1.5 V6t 	
6 	Keke Rosberg 	Canon Williams Honda Team 	 	FW10 	 	RA165E 1.5 V6t 	
7 	Nelson Piquet 	Motor Racing Developments Ltd. 	 	BT54 	 	M12/13 1.5 L4t 	
8 	Marc Surer 	Motor Racing Developments Ltd. 	 	BT54 	 	M12/13 1.5 L4t 	
9 	Manfred Winkelhock 	Skoal Bandit F1 Team 	 	03 	 	415T 1.5 L4t 	
10 	Philippe Alliot 	Skoal Bandit F1 Team 	 	03 	 	415T 1.5 L4t 	
11 	Elio de Angelis 	John Player Special Team Lotus 	 	97T 	 	EF4 1.5 V6t 	
12 	Ayrton Senna 	John Player Special Team Lotus 	 	97T 	 	EF4 1.5 V6t 	
15 	Patrick Tambay 	Equipe Renault Elf 	 	RE60 	 	EF4B 1.5 V6t 	
16 	Derek Warwick 	Equipe Renault Elf 	 	RE60 	 	EF4B 1.5 V6t 	
17 	Gerhard Berger 	Barclay Arrows BMW 	 	A8 	 	M12/13 1.5 L4t 	
18 	Thierry Boutsen 	Barclay Arrows BMW 	 	A8 	 	M12/13 1.5 L4t 	
19 	Teo Fabi 	Toleman Group Motorsport 	 	TG185 	 	415T 1.5 L4t 	
21 	Allen Berg 	Spirit Enterprises Ltd. 	 	101D 	 	415T 1.5 L4t 	
22 	Riccardo Patrese 	Benetton Team Alfa Romeo 	 	185T 	 	890T 1.5 V8t 	
23 	Eddie Cheever 	Benetton Team Alfa Romeo 	 	185T 	 	890T 1.5 V8t 	
24 	Piercarlo Ghinzani 	Osella Squadra Corse 	 	FA1F 	 	890T 1.5 V8t 	
25 	Andrea de Cesaris 	Equipe Ligier Gitanes 	 	JS25 	 	EF4B 1.5 V6t 	
26 	Jacques Laffite 	Equipe Ligier Gitanes 	 	JS25 	 	EF4B 1.5 V6t 	
27 	Michele Alboreto 	Scuderia Ferrari SpA SEFAC 	 	156/85 	 	031 1.5 V6t 	
28 	Stefan Johansson 	Scuderia Ferrari SpA SEFAC 	 	156/85 	 	031 1.5 V6t 	
29 	Pierluigi Martini 	Minardi Team SpA 	 	M185 	 	615-90 1.5 V6t 	
Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Entrants', statsf1.com, (Stats F1, 2015), https://www.statsf1.com/en/1985/etats-unis/engages.aspx, (Accessed 24/03/2019)
==Practice Overview==
==Qualifying==
===Friday Qualifying===
===Saturday Qualifying===
===Qualifying Results===
The full qualifying results for the are outlined below:
Pos. 	No. 	Driver 	Constructor 	Time 	Time 	Gap
Pos. 	No. 	Driver 	Constructor 	Q1 	Q2 	Gap
1 	12 	Ayrton Senna 	 	1:42.051 	— 	—
2 	5 	Nigel Mansell 	 	1:43.249 	— 	+1.198s
3 	27 	Michele Alboreto 	 	1:43.748 	— 	+1.697s
4 	2 	Alain Prost 	 	1:44.088 	— 	+2.037s
5 	6 	Keke Rosberg 	 	1:44.156 	— 	+2.105s
6 	16 	Derek Warwick 	 	1:44.163 	— 	+2.112s
7 	23 	Eddie Cheever 	 	1:44.231 	2:05.540 	+2.180s
8 	11 	Elio de Angelis 	 	1:44.769 	— 	+2.718s
9 	28 	Stefan Johansson 	 	1:44.921 	— 	+2.870s
10 	7 	Nelson Piquet 	 	1:45.194 	— 	+3.143s
11 	8 	Marc Surer 	 	1:45.979 	— 	+3.928s
12 	1 	Niki Lauda 	 	1:46.266 	— 	+4.215s
13 	19 	Teo Fabi 	 	1:46.546 	— 	+4.495s
14 	22 	Riccardo Patrese 	 	1:46.592 	— 	+4.541s
15 	15 	Patrick Tambay 	 	1:47.028 	— 	+4.977s
16 	26 	Jacques Laffite 	 	1:47.267 	— 	+5.216s
17 	25 	Andrea de Cesaris 	 	1:47.393 	2:12.268 	+5.342s
18 	3 	Martin Brundle 	 	1:47.563 	— 	+5.512s
19 	4 	Stefan Bellof 	 	1:47.911 	— 	+5.860s
20 	9 	Manfred Winkelhock 	 	1:47.926 	— 	+5.875s
21 	18 	Thierry Boutsen 	 	1:48.023 	— 	+5.978s
22 	24 	Piercarlo Ghinzani 	 	1:48.546 	2:11.268 	+6.495s
23 	10 	Philippe Alliot 	 	1:50.455 	2:24.814 	+8.404s
24 	17 	Gerhard Berger 	 	— 	2:05.387 	+23.336s
25 	29 	Pierluigi Martini 	 	3:04.446 	— 	+1:22.395
WD* 	21 	Allen Berg 	 	Withdrawn 	Withdrawn 	Withdrawn
Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)	Source:'1985 Detroit Grand Prix IV - QUALIFYING 1', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-1.html, (Accessed 24/03/2019)'1985 Detroit Grand Prix IV - QUALIFYING 2', formula1.com, (Formula One World Championship Ltd., 2019), https://www.formula1.com/en/results.html/1985/races/487/detroit/qualifying-2.html, (Accessed 24/03/2019)'USA 1985: Qualifications', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/qualification.aspx, (Accessed 24/03/2019)
*T Indicates a driver used their test/spare car to set their best time in that session.
*Bold indicates a driver's best/qualifying time.
** Berg's entry was withdrawn after an issue with his registration.
===Grid===
==Race==
===Report===
===Results===
The full results for the are outlined below:
Pos. 	No. 	Driver 	Constructor 	Laps 	Time/Retired 	Grid 	Points
1 	6 	Keke Rosberg 	 	63 	1:55:39.851 	5 	9
2 	28 	Stefan Johansson 	 	63 	+ 57.549s 	9 	6
3 	27 	Michele Alboreto 	 	63 	+ 1:03.170 	3 	4
4 	4 	Stefan Bellof 	 	63 	+ 1:06.225 	19 	3
5 	11 	Elio de Angelis 	 	63 	+ 1:26.966 	8 	2
6 	7 	Nelson Piquet 	 	62 	+ 1 Lap 	10 	1
7 	18 	Thierry Boutsen 	 	62 	+ 1 Lap 	21 	
8 	8 	Marc Surer 	 	62 	+ 1 Lap 	11 	
9 	23 	Eddie Cheever 	 	61 	+ 2 Laps 	7 	
10 	25 	Andrea de Cesaris 	 	61 	+ 2 Laps 	17 	
11 	17 	Gerhard Berger 	 	60 	+ 3 Laps 	24 	
12 	26 	Jacques Laffite 	 	58 	+ 5 Laps 	16 	
Ret 	12 	Ayrton Senna 	 	51 	Accident 	1 	
Ret 	3 	Martin Brundle 	 	30 	Collision 	18 	
Ret 	10 	Philippe Alliot 	 	27 	Collision 	23 	
Ret 	5 	Nigel Mansell 	 	26 	Accident 	2 	
Ret 	2 	Alain Prost 	 	19 	Brakes 	4 	
Ret 	22 	Riccardo Patrese 	 	19 	Electrical 	14 	
Ret 	16 	Derek Warwick 	 	18 	Transmission 	6 	
Ret 	15 	Patrick Tambay 	 	15 	Accident 	15 	
Ret 	29 	Pierluigi Martini 	 	11 	Engine 	25 	
Ret 	1 	Niki Lauda 	 	10 	Brakes 	12 	
Ret 	19 	Teo Fabi 	 	4 	Clutch 	13 	
Ret 	9 	Manfred Winkelhock 	 	3 	Turbo 	20 	
Ret 	24 	Piercarlo Ghinzani 	 	0 	Accident 	22 	
WD 	21 	Allen Berg 	 	 	 	 	
Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)	Source:'USA 1985: Result', statsf1.com, (Stats F1, 2016), https://www.statsf1.com/en/1985/etats-unis/classement.aspx, (Accessed 24/03/2019)
*T Indicates a driver used their test/spare car.
==Milestones==
* made their 100th Grand Prix start as a constructor.'6. USA 1985', statsf1.com, (Stats F1, 2014), https://www.statsf1.com/en/1985/etats-unis.aspx, (Accessed 24/03/2019)
* Nelson Piquet made his 100th start.
* competed at their 50th Grand Prix.
* 200th race entry for Castrol as a lubricant supplier.'1985 Detroit GP', chicanef1.com, (Chicane F1, 2015), http://www.chicanef1.com/racetit.pl?year=1985&gp=Detroit%20GP&r=1, (Accessed 24/03/2019)
* Fourth career victory for Keke Rosberg.
* secured their nineteenth victory.
** Engine partners claimed their fourth triumph.
* Elio de Angelis set a new record for most career fifth place finishes - 13.
==Standings==
Michele Alboreto retained the lead in the Championship as a result of the Detroit Grand Prix, and even managed to grow his advantage to seven points. Elio de Angelis, meanwhile, had moved into a clear second ahead of Alain Prost, while Stefan Johansson moved into fourth after his second second place in two races. Keke Rosberg, meanwhile, would leap into the top five after claiming victory, while double World Champion Nelson Piquet was finally on the board, albeit down in sixteenth.
In the Constructors' Championship it was still who led the charge, ending the weekend on 47 points. Indeed, the Scuderia had managed to extend their lead over with a double podium finish, opening a fourteen point gap between themselves and their Norfolk based challengers. Behind, had retained third ahead of , while appeared at the foot of the scorers' list in ninth.
World Championship for Drivers	World Championship for Drivers	World Championship for Drivers	World Championship for Drivers
Pos. 	Driver 	Pts. 	+/-
1 	Michele Alboreto 	31 	
2 	Elio de Angelis 	24 	1
3 	Alain Prost 	22 	1
4 	Stefan Johansson 	13 	2
5 	Keke Rosberg 	12 	4
6 	Patrick Tambay 	10 	2
7 	Ayrton Senna 	9 	2
8 	Thierry Boutsen 	6 	1
9 	Nigel Mansell 	5 	1
10 	Stefan Bellof 	4 	5
11 	Niki Lauda 	3 	1
12 	Andrea de Cesaris 	3 	1
13 	René Arnoux 	3 	1
14 	Derek Warwick 	2 	1
15 	Jacques Laffite 	2 	1
16 	Nelson Piquet 	1 	
World Championship for Manufacturers	World Championship for Manufacturers	World Championship for Manufacturers	World Championship for Manufacturers
Pos. 	Team 	Pts. 	+/-
1 	 	47 	
2 	 	33 	
3 	 	25 	
4 	 	17 	1
5 	 	12 	1
6 	 	6 	
7 	 	5 	
8 	 	4 	
9 	 	1 	
Only point scoring drivers and constructors are shown.
==References==
Images and Videos:
* 
References:
Category:Grand Prix articles
Category:Grand Prix articles
Category:1985 Grands Prix
Category:Detroit Grand Prix
Category:Formula One races in the United States