1985 Lancia Delta S4 Stradale
Built as a road going version of Lancia’s Group B contender, the Delta S4 Stradale possessed all the radical traits of the race car it was made from. This included the interested dual-stage induction which included both a supercharger and turbocharger. Although detuned for the sanity, this system catapulted the Group B version to 600 bhp and zero to sixty in less than two seconds.
Two hundred S4 Stradales were required and built for homologation, and no doubt many were taken from the road right back onto into motor sports. Very few cars remain unmolested; especially considering a removing the air restrictors and a changing a few adjustments doubled the available power.
In Detail
submitted by | Richard Owen |
engine | Inline-4 |
position | Mid, Longitudinal |
aspiration | Duel Stepped Volumex Supercharger & KKK Turbocharger |
valvetrain | DOHC, 4 Valves per Cylinder |
fuel feed | I.A.W. Weber Marelli Electronic Fuel Injection |
displacement | 1759 cc / 107.3 in³ |
bore | 88.5 mm / 3.48 in |
stroke | 71.5 mm / 2.81 in |
compression | 7.0:1 |
power | 186.4 kw / 250 bhp |
specific output | 142.13 bhp per litre |
bhp/weight | 208.33 bhp per tonne |
torque | 291.5 nm / 215 ft lbs @ 4500 rpm |
body / frame | Fiber Glass Body over Chrome-Molybdenum Steel Spaceframe |
driven wheels | 4WD w/Limited-Slip Viscous Center Coupling, Front & rear Self-Locking ZF Differentials |
front tires | 205/55 VR 16 |
rear tires | 205/55 VR 16 |
front brakes | Vented Brembo Discs |
f brake size | mm / in |
rear brakes | Vented Brembo Discs |
r brake size | mm / in |
steering | Rack & Pinion w/Power Assist |
f suspension | Unequal Length Wishbones |
curb weight | 1200 kg / 2646 lbs |
wheelbase | 2440 mm / 96.1 in |
front track | 1510 mm / 59.4 in |
rear track | 1535 mm / 60.4 in |
length | 3990 mm / 157.1 in |
width | 1880 mm / 74.0 in |
height | 1360 mm / 53.5 in |
transmission | 5-Speed Manual |
gear ratios | :1 |
key drivers | Markku Alen, Henri Toivonen, Fabrizio Tabaton, Massimo Biasion |
race victories | RAC 1985, Monte Carlo 1986, Argentina 1986, Italy 1986, USA 1986 |