of 2,241 units, the E28 M5 remains among the rarest regular production BMW Motorsport cars – after the M1 (456 units), M5 (E34) Touring (891 units) and the 850CSi (1,510 units). E34 M5 (1988–1995) The E34 generation of the M5 was produced from September 1988 to August 1995. Powered by the S38 straight-six engine, an evolution of the previous generation's straight-six, it was initially produced in a sedan body style, with a LHD Touring (wagon/estate) version following in 1992. Production of M5 models began with the painted bodyshell of an E34 5 Series at the BMW Dingolfing plant. The shells were then transported to BMW M GmbH in Garching, where the car was assembled by hand over a period of two weeks. Only the South African M5 was entirely assembled at the Rosslyn, South Africa assembly plant from complete knock-down kits supplied from Garching, Germany. The M5 Touring, which was BMW M Division's first wagon as well as the last hand-built M car, saw 891 units produced. Total production of the E34 M5 was 12,254 units, of which 8,344 were 3.5-litre and 3,910 were 3.8-litre. In the North American market, only the 3.5-litre version was sold (model years 1991–1993). Cosmetic changes to the exterior from the standard E34 included unique front and rear bumpers and side rocker panels, contributing to a drag coefficient of 0.32 (from 0.30), and interior updates included a unique gearshift surround and rear headrests. The second-generation M5 was introduced with the S38B36 engine, which generated at 6,900 rpm and of torque at 4,750 rpm, touting a factory 0- acceleration figure of 6.3 seconds. Top speed was electronically limited to . Updates In late 1991 (1992 model year), the engine was upgraded to the 3.8-litre S38B38, with exception to North America and South Africa, which continued with the 3.5-litre engine due to emission laws. Power increased to , leading to a factory 0- acceleration time of 5.9 seconds, and the ignition changed to a distributor-less system with each cylinder having an individual coil. BMW also used a dual-mass flywheel in place of the single in the 3.5-litre version for a smoother idle and throttle input at the expense of response. The standard self-leveling suspension (SLS) system, which maintained a constant ride height in the rear, was replaced with Electronic Damper Control (EDCIII+), an electronically controlled and hydraulically regulated system that can switch between comfort "P" setting and