BMW M5
* (USA/Canada) - (256 bhp (191 kW) in USA/Canada units) S38B35 Engine with 9.8:1 Compression. All US-Specification M5s were comprehensively optioned. Leather Door Panels, Leather Center Console, Full Trunk Carpeting, Air Conditioning, Power Windows, Power Sunroof, Power Seats, Cruise Control, On-Board Computer, Central Locking and Shadowline Trim were standard. The only option on a US-Specification M5 was electrically heated front seats which were standard equipment on Canadian-Market cars. All North American specification M5s were finished in "Schwarz" or Jet Black. Officially US Specification cars were only available with Natur (Tan) leather interiors, however Black was offered in Canada and a handful of US-Bound cars were built with black interiors. The early E34 M5 used an evolution of the 24-valve straight-6 found in the E28 M5 and E24 M635CSi/M6. The engine was designated S38B36, with a bore of 93.4 mm (3.677 in) and stroke of 86 mm (3.386 in) for a total capacity of 3,535 cc (215.7 cu in). The added stroke is due to a new forged steel crankshaft, though the camshafts were also changed. Compression ratio was up slightly (10:1 versus 9.8:1). Other adjustments made included an electronically controlled butterfly valve in the intake plenum, which provided better low rpm and mid-range power. The engine also featured an improved flywheel, Bosch Motronic fuel injection, equal length stainless steel exhaust headers, and three way ceramic catalysts. Originally it had a displacement of 3.6 litres, and produced 232 kW (315 PS; 311 bhp), and 360 N·m (266 ft·lbf) at 4750 rpm. Cars sold in North America and Switzerland, due to a different catalytic converter, produced 229 kW (311 PS; 307 bhp).