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. Power increased to 250 kW (340 PS 335 hp), leading to a factory 0-97 km/h (60 mph) acceleration time of 5.9 seconds, and the ignition changed to a distributor-less system with each cylinder having an individual coil. 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. Updates BMW S38 straight-six engine (3.8 L version) Top speed was electronically limited to 250 km/h (160 mph). The second-generation M5 was introduced with the S38B36 engine, which generated 232 kW (315 PS 311 hp) at 6,900 rpm and 360 N⋅m (266 lb⋅ft) of torque at 4,750 rpm, touting a factory 0-97 km/h (60 mph) acceleration figure of 6.3 seconds. Ĭosmetic 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.

In the North American market, only the 3.5-litre version was sold (model years 1991–1993). 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. The M5 Touring, which was BMW M Division's first wagon as well as the last hand-built M car, saw 891 units produced. 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 shells were then transported to BMW M GmbH in Garching, where the car was assembled by hand over a period of two weeks. Production of M5 models began with the painted bodyshell of an E34 5 Series at the BMW Dingolfing plant. With a total production 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). Production of the M5 continued until November 1988, almost a year after BMW had ceased production of regular E28 models. Thereafter, the M5 production was moved to Daimlerstrasse in Garching where the remainder were built. Assembly took place at BMW Motorsport's plant in Preussenstrasse in Munich prior to the 1986 factory summer vacation. Īside from 96 cars which were assembled in kit form at BMW's Plant in Rosslyn, South Africa, all cars were assembled by hand in Germany. Production of North American specification M5 commenced in November 1986 and ended in November 1987. The results of this class action was that owners were given a voucher for US$4,000 in 1993.

Due to an extended production run that exceeded BMW's original forecast of production volumes, a class action lawsuit was launched by owners in the United States. Ĭars sold in the United States and Canada used a detuned version of the M88/3 called the S38B35, which was equipped with a catalytic converter and has a power output of 191 kW (256 hp). The European and South African cars used the M88/3 engine which has a power output of 210 kW (286 PS 282 hp). The official markets for the E28 M5 were Europe, Great Britain, the United States, Canada, and South Africa.

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