"It’s not every day you come upon a car like the Audi 90 quattro IMSA GTO. This is a car that was short-lived, revolutionary, and awesome. Born following the Group B rally era, when Audi decided it wanted to see what the quattro system could do on pavement, it was the first all-wheel-drive car to compete in IMSA. In the late 1980s the IMSA GT series was at its peak, and the cars of the GT class lacked many restrictions. The 90 quattro fit in perfectly as it was hardly a GT car; it wasnothing [sic] less than a bespoke race car. One look at its ultra-wide body -- possibly the widest ever built -- will tell you that before your eyes is nothing more than a carbon-fiber silhouette shell. Underneath you will find a full-race tube chassis. Sitting forward of the front axle is a 720-horsepower motor driving all four wheels. It is a monster in all regards; lightning quick, with more grip than most can put to the pavement. During its single season in the IMSA GT Camel Pro series, the Audi 90 won seven of the 13 races. Audi went on to race in DTM, where quattro technology continued to dominate."—Official description[1]
The 1989 Audi #4 Audi 90 quattro IMSA GTO - abbreviated as "#4 Audi 90" or "Audi #4 90 GTO"[2] - is a GTO race car by Audi.
It appears in Forza Motorsport 5 as part of the Nürburgring Booster Pack and all subsequent Motorsport main series titles.
Synopsis[]
The 90 quattro IMSA GTO was designed for the 1989 IMSA GT Championship series to compete in the GTO class. Similar to the Group B quattro S1, it is all-wheel drive and powered by a turbocharged inline-five with power increased to 711 hp (530 kW). The Audi of America team would field two cars in all of the GT only races during the season and the all championships race at Road America.
The #4 was driven by Hans-Joachim Stuck, with Walter Röhrl joining for the rounds at Road America and Watkins Glen. A sibling car, the #5, had Hurley Haywood at the wheel, with Scott Goodyear joining for Road America and the round at Mosport. The two cars' season would not get off to a good start, with the two cars finishing 34th and 36th, respectively, at the race around the streets of Miami. They would rebound though, finishing 1-2 in the race at Summit Point and the #4 would also take the win at the race after that at Mid-Ohio. The next two races at Mosport and Road America wouldn't go as well for either car, with the best result being a 9th place for the #5 at Mosport.
Things would really improve for the team from Portland onward, especially for the #4, which would finish on the top two steps of the podium for 7 races straight, taking 5 wins and 2 second places. The #5 wouldn't be far behind, finishing 2nd four times, and 3rd and 4th once each during that time frame. This success would not last until the end of the season though, as at the season finale race at Del Mar, the #4 would finish 26th and the #5 would finish just behind in 27th.[3] Even with the 7 wins, Stuck would not win the drivers' championship, instead finishing 3rd behind the main drivers of the Mercury Cougar XR-7s. Haywood would end up finishing just behind Stuck in 4th.[4]
After that one season, Audi decided to withdraw from the IMSA GT Championship to instead focus on the Deutsche Tourenwagen Meisterschaft (DTM) championship.[5] The #4 is currently stored at Audi Tradition, a storage facility near Audi's headquarters in Ingolstadt, Germany.[6]
Statistics[]
|
Speed 7.8 Handling 6.7
Acceleration 9.8
Launch 10.0
Braking 7.3
|
P 908 |
|---|---|---|
Required DLC:
Requires the Nürburgring Booster Pack | ||
Unlock Requirements
Car Dealer:
Purchase from the car dealer for 630,000 CR | ||
Performance & Body Family
Body Family: None
Value: 630,000 CR
Speed:
Top Speed: 209.6 mph (337.2 km/h)
Acceleration:
0-60 mph (0-97 km/h): 2.500 secs.
0-100 mph (0-161 km/h): 5.882 secs.
Braking:
60-0 mph (97-0 km/h): 83.6 ft (25.5 m) 100-0 mph (161-0 km/h): 207.6 ft (63.3 m)
Lateral Gs:
60 mph (97 km/h): 1.47 g
120 mph (193 km/h): 1.65 g | ||
|
Speed 7.0 Handling 6.6
Acceleration 9.5
Braking 6.5
|
R 847 |
|---|---|---|
Unlock Requirements
Car Dealer:
Purchase from the car dealer for 630,000 CR | ||
Performance & Division
Division: Early GT Racing
Value: 630,000 CR
Speed:
Top Speed: 191.5 mph (308.1 km/h)
Acceleration:
0-60 mph (0-97 km/h): 2.500 secs.
0-100 mph (0-161 km/h): 5.900 secs.
Braking:
60-0 mph (97-0 km/h): 87.8 ft (26.8 m) 100-0 mph (161-0 km/h): 212.8 ft (64.9 m)
Lateral Gs:
60 mph (97 km/h): 1.40 g
120 mph (193 km/h): 1.46 g | ||
|
Speed 7.0 Handling 6.8
Acceleration 9.5
Braking 6.7
Rare
|
R 859 |
|---|---|---|
Unlock Requirements
Showcase:
Complete the Moments in Motorsport Showcase event | ||
Performance & Division
Division: GT Racing Reborn
Value: ? CR
Collection Tier:
Tier 3 - Rare (+450)
Speed:
Top Speed: 191.3 mph (307.8 km/h)
1/4 Mile: 9.983 secs.
Acceleration:
0-60 mph (0-97 km/h): 2.518 secs.
0-100 mph (0-161 km/h): 5.920 secs.
Braking:
60-0 mph (97-0 km/h): 91.8 ft (28 m) 100-0 mph (161-0 km/h): 225.0 ft (68.6 m)
Lateral Gs:
60 mph (97 km/h): 1.42 g
120 mph (193 km/h): 1.55 g | ||
|
Speed 5.2 Braking 6.1
Handling 6.2
Acceleration 7.4
|
R 857 |
|---|---|---|
Unlock Requirements
Car Dealer:
Challenge Hub:
Can be purchased from the Car Dealer for 282,000 CR This vehicle has been made available as a Challenge Hub reward. Update 21 & thereafter - Complete the "Touring World Tour Challenge" challenge | ||
Performance & Division
Division: GTX Sportscars
Value: 282,000 CR
Speed:
Top Speed: 191.3 mph (307.8 km/h)
1/4 Mile: 9.983 secs.
Acceleration:
0-60 mph (0-97 km/h): 2.518 secs.
0-100 mph (0-161 km/h): 5.920 secs.
Braking:
60-0 mph (97-0 km/h): 91.8 ft (28 m) 100-0 mph (161-0 km/h): 225.0 ft (68.6 m)
Lateral Gs:
60 mph (97 km/h): 1.42 g
120 mph (193 km/h): 1.55 g | ||
Conversions[]
- No conversions available.
Trivia[]
- In Forza Motorsport (2023), prior to Update 21, it was valued at 319,000 CR.
Gallery[]
(Front)
(Rear)
Thumbnail
Promotional[]
References[]
- ↑ "Forza Motorsport 6 - Cars" . forzamotorsport.net . Retrieved 08-07-2018.
- ↑ Abbreviation in Forza Motorsport (2023)
- ↑ "Audi 90 quattro results" . racingsportscars.com . Retrieved 06-25-2025.
- ↑ "1989 IMSA GTO Championship Drivers' Standings" . driverdb.com . Retrieved 06-25-2025.
- ↑ "Retrospective>> Quattro Firepower: The Imsa Audi 90 Gto" . speedhunters.com . Retrieved 08-07-2018.
- ↑ "Audi Tradition: QuattroWorld Visits Audi’s Hidden Museum" . quattroworld.com . Retrieved 06-25-25.