Wheelspin限定車両 
 2010 Audi TT RS Coupe
 1964 Austin FX4 TAXI
 2013 Bentley Continental GT Speed Forza Edition
 1988 BMW M5 Forza Edition
 2013 BMW M6 Coupe Forza Edition
 2013 Cadillac XTS Limousine
 2013 Caterham Superlight R500 Forza Edition
 1979 Chevrolet Camaro Z28
 1969 Chevrolet Nova Super Sport 396 Forza Edition
 2010 Ford Crown Victoria Police Interceptor
 2011 Ford F-150 SVT Raptor
 1972 Ford Falcon XA GT-HO Forza Edition
 1993 Ford SVT Cobra
 1973 Ford XB Falcon GT
 2004 Honda Civic Type R
 2005 Honda NSX-R
 1972 Hoonigan Chevrolet Napalm Nova
 2006 Hummer H1 Alpha
 2014 Jeep Grand Cherokee SRT
 2016 Lamborghini Aventador LP750-4 SV
 2012 Lamborghini Aventador LP700-4 Forza Edition
 1992 Lancia Delta HF Integrale Evo
 1972 Land Rover Series III Forza Edition
 2009 Lotus 2-Eleven
 2005 Lotus Elise 111S
 2013 Mercedes-Benz E 63 AMG
 2012 Mini JCW GP
 1995 Nissan Nismo GTR LM
 1973 Pontiac Firebird Trans Am SD-455
 2018 Porsche Cayenne Turbo
 1980 Renault 5 Turbo Forza Edition
 2010 Renault Clio R.S. Forza Edition
 2004 Subaru WRX STi
 2014 Volkswagen Global RallyCross Beetle
 2010 VW Golf R
 1963 Volkswagen Type 2 De Luxe Forza Edition

登場する自動車以外の乗り物 
いずれもショーケース・イベントにてレースをすることになる。
ホバークラフト
モトクロッサー
フライング・スコッツマン(機関車)
戦闘機

ラジオ局

Horizon Pulse
レイドバック・ポップス

Horizon Bass Arena
エレクトロ&テクノ

Horizon Block Party
ヒップホップ

Horizon XS
ロック&パンク&メタル

HOSPITAL Records
ドラムンベース

Timeless
クラシック音楽

Radio Awesome
LEGO Valley限定ラジオ局

ユニコーンカー 
各シーズンでのチャレンジを達成して獲得できる限定車両。

 2019 Porsche 911 GT3 RS
 2017 Ferrari 812 Superfast
 2017 Chevrolet Colorado ZR2
 2018 Honda Civic Type-R (FK8)
 1994 Ferrari F355 Berlinetta
 2011 Hot Wheels Bone Shaker
 1965 Hoonigan Gymkhana 10 Ford Hoonicorn Mustang
 2017 Hoonigan Gymkhana 10 Ford Fiesta
 2018 KTM X-Bow GT4
 2016 Hoonigan Gymkhana 10 Ford Focus RS RX
 1984 Honda Civic CRX Mugen
 2010 Mosler MT900S
 1952 Hudson Hornet
 2011 DS Automotive DS 3 Racing
 1986 Hoonigan Ford RS200 Evolution
 2012 Hot Wheels Rip Rod
 2005 Hot Wheels Ford Mustang
 1967 Mercedes-Benz 280 SL
 2017 Maserati Levante S
 723 Quartz Regalia
 723 Quartz Regalia Type-D
 2012 Cadillac Escalade ESV
 1994 Honda Prelude Si
 1994 Nissan Fairlady Z Version S Twin Turbo (Z32)
 2001 TVR Tuscan S
 2019 BMW Z4 Roadster
 2002 BMW M3 GTR
 2018 Ford #88 Mustang RTR
 2018 Ford #25 Mustang RTR
 2018 Ford Mustang RTR Spec 5
 1999 Lotus Elise series 1 sport
 1965 Pontiac GTO
 1970 Porsche 914/6
 1973 Ford Capri RS3100 Forza Edition
 2018 Mercedes-AMG GT 4-Door Coupe
 2018 Mercedes-Benz X-class
 2010 Ferrari 599XX Evoluzione
 1958 Plymouth Fury
 1967 Chevrolet Chevelle Super Sport 396
 2009 Vauxhall Corsa
 2018 Apollo Intensa Emozione
 2018 Mini X-Raid JCW Buggy
 2018 Mini JCW Convertible
 2018 Mini JCW Countryman ALL4
 2008 Maserati MC12 Versione Corsa
 1970 Buick GSX
 1965 Morris Mini-Traveller
 2019 Rimac Concept 2
 2014 Maserati Ghibli S Q4
 1969 Fiat Dino Coupe
 1970 AMC Rebel ‘The Machine’
 2013 Jeep Wrangler Unlimited DeBerti Design
 2011 McLaren 12C Coupe
 2006 Koenigsegg CCX
 1996 Chevrolet Impala Supersport
 2019 Aston Martin DBS Superleggera
 2017 Aston Martin Vanquish Zagato coupe
 1967 Volkswargen Karmann GHIA
 1967 Volkswargen Type 3 1600 L
 2019 Porsche Macan Turbo
 2018 ItalDesign Zerouno
 2018 Porsche 718 Cayman GTS
 1970 Porsche #3 917 LH
 1966 Porsche 906 Carrera 6
 1951 Porsche 356 SL
 2019 McLaren 720S Spider
 2018 McLaren 600LT Coupe
 2018 Ford F-150 PreRunner DeBerti Design Truck
 2018 Volkswagen #94 Volkswagen Motorsport I.D. R Pikes Peak
 2019 Bugatti Divo
 2010 BMW M3 GTS
 2010 Rossion Q1
 2008 Koenigsegg CCGT
 2019 Ferrari 488 Pista
 2018 ATS GT
 1999 Lamborghini Diablo GTR
 1970 Ferrari 512 S
 2018 Renault Megane R.S.
 2017 Alpine A110
 2016 Renault Clio R.S. Concept
 2008 Renault Megane R26.R
 2007 Renault Clio RS 197
 2003 Renault Sport Clio V6
 1970 Mercury Cougar Elimanator
 2018 Lamborghini Huracan Performante
 2006 Hummer H1 Alpha Open Top
 1985 Toyota Sprinter Trueno GT Apex
 1964 Porsche 356C Cabriolet Emory
 2017 Aston Martin Vulcan AMR Pro
 2010 Lexus LFA
 1994 Ford SuperVan 3
 1984 Rover SD1 Vitesse
 2019 McLaren SpeedTail
 1969 Toyota 2000GT
 1933 Napier Napier-Railton
 2018 Ferrari Portofino
 1995 Porsche 911 Carrera 2 by Gunther Werks
 2018 Mercedes-AMG E 63 S
 2013 Formula Drift #777 Chevrolet Corvette
 2007 Formula Drift #117 599 GTB Fiorano
 1992 Toyota Supra 2.0 GT Twin Turbo
 1999 Ford Racing Puma
 1994 Toyota Celica GT-FOUR ST205
 1992 Toyota Celica GT-FOUR RC ST185
 1991 Peugeot 205 Ralleye
 1990 Nissan Pulsar GTI-R
 1998 Mitsubishi Starion ESI-R
 1995 Toyota MR2 GT
 1989 Toyota MR2 SC
 1974 Toyota Celica GT
 1973 Toyota Corolla SR5
 2019 Zenvo TSR-S
 1970 Ford GT70
 1977 Ford #5 Escort RS1800 MkII
 1985 Mazda RX-7 GSL-SE
 1988 Holden VL Commodore Group A
 2011 HSV GTS
 1996 HSV GTS-R
 1991 Bentley Turbo R
 2018 Jaguar I-Pace
 2018 Land Rover Range Rover Velar First Edition
 2018 Formula Drift #64 Nissan 370Z
 2009 Lexus IS F
 2015 Lexus RC F
 2013 Toyota GT86
 1991 GMC Cyclone
 1992 GMC Typhoon
 2019 Hennessey VelociRaptor 6x6
 1990 Porsche 911 reimagined by Singer
 1995 BMW 850 CSi
 1987 Mercedes-Benz AMG Hammer Coupé
 1924 Austin Seven
 1979 Triumph TR7 Roadster
 2020 Koenigsegg Jesko
 1975 Fiat X1/9
 1974 Hoonigan Ford Bronco
 1992 Alfa Romeo 155 Q4
 2020 Chevrolet Corvette Stingray Coupe
 1990 Chevrolet Camaro IROC-Z
 1970 Honda S800
 2020 Ford Mustang Shelby GT500
 2012 Shelby 1000
 2019 RAESR Tachyon Speed
 2007 Peugeot 207 Super 2000
 1963 Porsche 356 Emory Outlaw RSR
 1968 Pontiac Firebird
 2020 Jeep Gladiator Rubicon
 1975 Citroen DS 23
 1993 Porsche 928 GTS
 1972 Mazda Cosmo 110S Series II
 1973 Mazda RX-3
 2018 Saleen S1
 2017 VUHL 05RR

DLC 

Microsoft StoreおよびSteamにて配信されている。

Forza Horizon 4 VIPメンバーシップ 

 2倍のレースリワード、VIP限定コスチューム、VIP限定ホーン、無料の家、ボーナススーパーホイールスピンなどを獲得することができる。