Audi Sport quattro S1 Pikes Peak (1987)

audi-sport-quattro-pikes-peak

Audi revolutionized rallying with the quattro and it was not long after that some saw the potential of the car for the legendary Pikes Peak “Race to the Clouds” event. In fact, the quattro would become a winner 6 years in a row; John Buffum (1982-83 / quattro), Michèle Mouton (1984-85 / Sport quattro S1), Bobby Unser (1986 / S1 E2), and lastly in 1987 with Walter Röhrl.

Before we get to Röhrl’s very special machine, let’s revisit the events leading to it: In 1986, Audi had abandoned their Group B WRC program early in the season due to the spectator deaths in Portugal and other safety concerns. However, some insiders stated that the truth was that Audi was under pressure from VW to terminate its rally operations since they weren’t competitive any more. In any case, Group B itself was eventually banned at the end of the same year which would have netted the same result. Many people felt like the short lived Sport quattro S1 E2 didn’t achieve nor had proven its full potential, especially versus Audi’s arch rival Peugeot and their 205 T16. As such, Audi prepared a very special version of their car specifically for the 1987 Pikes Peak race. One car to prove that it can once again reign supreme. It was to be the ultimate iteration of the quattro. You could even say how the Group B quattro might have evolved into if given the chance.

For the Pikes Peak special edition, although the car’s official designation remained the same as the rally model, it was much different under its skin than its predecessor of the same name. The new car featured a brand new full spaceframe construction instead of a monocoque chassis (found on all the previous versions). This allowed to substantially lower the weight of the car and much improve the bias (50/50) by relocating various key components. Further aerodynamic improvements were performed by adding a double stack rear spoiler and a very iconic front spoiler. The suspension itself was also redesigned to a double wishbone setup. For power, the car had “officially” around 600 HP, which was the same about tune used in the 1985 Finland rally, but insiders claimed that the Pikes Peak version realistically had closer to 1000 HP. Walter Röhrl later stated in an interview that the car actually had 750 HP and that the throttle was like an “on/off switch”.

The car gave Röhrl the opportunity for his record breaking run of 10:47.850 and be the first ever competitor to reach the peak under 11 minutes. He also defeated a fleet of three specially prepared 205 T16s that Peugeot had entered in hopes to stop Audi’s reign at the event. In the end, Audi had won its gamble and immediately retired the rally quattro from competition, but this time as a legendary champion. Audi’s motorsport aspirations thereafter shifted to circuit racing.

It is worth mentioning that the “quattro” is correctly spelled with a small “q” which also can be used to specify the Audi four/all wheel drive system. For more information about the correct spelling, CLICK HERE!

SPECIFICATIONS

Group/Class Unlimited Pikes Peak Special Version
Years active 1987  # built: 1
Engine
Type I-5, DOHC 20v, gas engine located front longitudinal with 27.5oright inclination
Displacement 2110 cc
Compression ratio 7.5:1
Output power – torque
  • 598 HP @ 8000 rpm (claimed)
  • 750 HP @ – rpm (Röhrl statement)
  •  435 lb-ft @ 5500 rpm (claimed)
Materials block: aluminium cylinder head: aluminium
Aspiration
  • KKK K28 turbocharger
  • Bosch LH-jetronic multipoint electronic fuel injection
  • Recirculating “boost into exhaust” anti-lag system
Ignition electronic / firing order 1-2-4-5-3
Cooling system water-cooled
Lubrication system dry sump with 1 oil cooler
Transmission
Type four wheel drive Dual clutch « power shift » 6 speed transmission
Gearbox ratios 1st: 3.179
2nd: 2.155
3rd: 1.580
4th: 1.214
5th: 0.977
6th: 0.825
F: 4.059
Differential ratio N/A Front, center, and rear self locking
Clutch dry – double plate
Chassis-body
Type Tubular space-frame construction. 2 door coupe steel/kevlar bodyshell with plastic front/rear bonnets and bumper covers. NACA style roof cooling duct. Aerodynamic “double stack” spoilers to the front and rear of the car to increase downforce. Side deflectors. Single seater.
Front suspension Double wishbone
Rear suspension Double wishbone
Steering system rack and pinion with hydraulic power assistance 12.4:1
Brakes front/rear 4 aluminium piston calipers, front ventilated rotors 330mm diameter, rear ventilated rotors 304mm diameter dual circuit with servo
Dimensions
length: 4250 mm (167.3 in) width: 1860 mm (73.2 in) heigth : 1344 mm (52.9 in)
wheelbase: 2224 mm (87.6 in) front track : 1465 mm (57.7 in) rear track: 1502 mm (59.1 in)
Rims – tires front and rear

  • 16  inch
Michelin
Dry/Unladen Weight 1000 kg (2205 lb)  Bias Front/Rear%: 50/50 (claimed)
Weight/power 1.7 kg/HP (3.7 lb/HP)
Fuel tank N/A

GALLERY & VIDEOS

S1 PP s1ppe Pikes_Peak_quattro1

BP Audi quattro S1 Pikes peak

Audi_S1_Pikes_Peak PPS1 s1pp s1pp1

rpps1 rohrl-pps1


(C) Article by Jay Auger

Website owner & author


Do you want to contribute information or pictures to this page? Please feel free to do so by using this CONTACT form!

(C) WELCOME TO THE ENCYCLOPEDIA OF THE GOLDEN ERA OF RALLYING