Audi introduced the original Quattro to European customers in late 1980,[4] featuring Audi’s quattro permanent four-wheel drive system, and the first to mate the front-engine, four-wheel-drive layout with a turbocharged engine.
The original engine was the 2,144 cc (2.1 L), longitudinally-mounted inline-5-cylinder 10 valve SOHC, with a turbocharger and intercooler. It generated 147 kW (200 PS; 197 hp) and torque of 285 N⋅m (210 lbf⋅ft) at 3,500 rpm, propelling the Quattro from 0 to 100 km/h (62 mph) in 7.1 seconds, and on to a top speed of over 220 km/h (137 mph).
The displacement of the engine was dropped slightly from 2144 cc to 2133 cc with a bore x stroke of 79.3 mm × 86.4 mm (3.1 in × 3.4 in) for the Rally car so that Audi could satisfy the 3-litre rallying class with a 1.4 times multiplication factor. Valvetrain was DOHC 4 valves per cylinder (20 valves in total) with an oil cooled KKK K27 turbocharger at 1.03 bars (14.9 psi) and Air-to-Air – Längerer & Reich intercooler fed by Bosch LH-Jetronic fuel injection, generating 225 kW (306 PS; 302 hp) at 6,700 rpm and 350 N⋅m (258 lbf⋅ft) of torque at 3,700 rpm.
The engine was eventually modified to a 2,226 cc (136 cu in) inline-5 with 10 valves, still generating 147 kW (200 PS; 197 hp), but with peak torque lower in the rev-range.[4] In 1989, it was then changed to a 2,226 cc (136 cu in) inline-five 20-valve DOHC setup generating 162 kW (220 PS; 217 hp), now with a top speed of 230 km/h (143 mph).
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