1985 Lancia Delta S4 Group B

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	410.1 kw / 550 bhp @ 8000 rpm
specific output	312.68 bhp per litre
bhp/weight	458.33 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