Cosworth
Early types
The following is the list of initial products, with cylinder heads modified, but not originally designed by Cosworth, on Ford Kent engine cylinder blocks.

Cosworth

Section Title: Early types
Table Section Text: The following is the list of initial products, with cylinder heads modified, but not originally designed by Cosworth, on Ford Kent engine cylinder blocks.

designation	year	block	displacement	claimed power	description	intended for

Mk.I	1959	105/107E	997 cc	–	Experimental one-off to test cam designs	Development of A2 and A3 camshaft

Mk.II	1960	105/107E	997cc	75 bhp	First series production engine, A2 cam	Lotus Mk.VII

Mk.III	1960	105/107E	997cc	85–90 bhp	A3 cam, optional dry sump	Formula Junior

Mk.IV	1961	105/107E	1098 cc	90–95 bhp	Mk.III with larger bore.	Formula Junior

Mk.V	1962	109E	1,340 cc	80 bhp	Series production road engine	Lotus Mk.VII

Mk.VI	1962	109E	1,340 cc	105 bhp	Racing version of Mk.V	Lotus Mk.VII

Mk.VII	1962	109E	1,475 cc	120 bhp	Mk.VI with larger bore	1.5 litre class

Mk.VIII	1963	116E	1,498 cc	90 bhp	Improved Mk.V on 5 main bearing block	Lotus Mk.VII

Mk.IX	1963	116E	1,498 cc	120–125 bhp	Racing version of Mk.VIII	1.5 litre class

Mk.X	1963	116E	1,498 cc	–	Experimental one-off Lotus TwinCam	Development of Mk.XII and XIII

Mk.XI	1963	109E	1,098 cc	100–110 bhp	Improved Mk.IV, dry sump	Formula Junior

Mk.XII	1963	116E	1,594 cc	140 bhp	Racing Lotus TwinCam, stock crank and rods, dry sump	Lotus 20B, 22, 23

Mk.XIII	1963	116E	1,594 cc	140–150 bhp	Improved Mk.XII with steel crank and rods, dry sump	Formula B, Lotus 22, 23B, 23C

Mk.XIV	1963	116E	1,498 cc	100 bhp	Improved Mk.VIII	Lotus Mk.VII

Mk.XV	1963	116E	1,594 cc	135–145 bhp	Racing Lotus TwinCam, steel crank and rods, wet sump	Lotus 26R, Lotus Cortina

Mk.XVI	1963	116E	1,498 cc	140–150 bhp	Mk.XIII for 1.5L class	Note

Mk.XVII	1964	109E	1,098 cc	120 bhp	Improved Mk.XI, downdraft intake ports, dry sump	Formula Junior

MAE	1965	109E	997 cc	100–110 bhp	Improved Mk.III, downdraft intake ports, dry sump	Formula 3

Sentence(s)

Cosworth has a 997 cc engine.

final_sentence: Cosworth has a 997 cc engine.