Sunday, November 26, 2006

BMW M5 E28





E28 M5 (1984-1987)


The first M5, based on the E28 5-Series, made its debut at the 1984 Amsterdam Motor Show. It was the product of demand for an automobile with the carrying capacity of a saloon (sedan), but the overall performance of a sports car. It utilized the 535i chassis and an evolution of the engine from the BMW M1. The M5 was handbuilt by Motorsport technicians and at its launch was the fastest production saloon (sedan) in the world.
The M5 was offered in four different versions. The first version was the Left Hand Drive (LHD) Euro Spec M5. The second version was the Right Hand Drive (RHD) Spec M5. The third version was the North American Spec (NA or so-called 1988) M5. The fourth version was the South African (ZA) Spec M5.
The LHD, RHD Euro Spec M5s and the ZA spec M5s had the M88/3 powerplant which delivered 286 hp DIN (210 kW) whereas the North American 1988 M5 was equipped with the S38 6-Cylinder engine that had a catalytic converter, which reduced the power output to 256 hp DIN (191 kW). The S38 differed from the M88/3 in that it had 9.8:1 compression versus the M88/3's 10.5:1. The S38 also used a dual-row timing chain where the M88/1 used a single-row chain. Initially 500 were to be made for the US Market, BMW later increased production to as many as 1,370 units for the US and Canadian Markets although the generally accepted figure is 1,244 units sold.
The NA Spec Models are unique in that technically there were all finished in Schwarz (Black) with Natur (Tan) interiors. The otherwise virtually identical Canadian-Spec M5s were also available with Black interiors as an option however a handful of US Models were also equipped with Black interiors.
US VINs range from 2791000-2792000 and 2875000-2875320 Car # 2791000 is not known to have been built and not all VINs are known to have been used. Car # 2791001 has been retained by BMW of North America as part of their Mobile Tradition collection.
While every NA-Spec E28 M5 was a 1988 Model Year car, production of North American specification M5s commenced in November of 1986 and ended in November of 1987. Excepting 96 units that were assembled in kit form at BMW's Plant in Rosslyn, South Africa, all E28 M5s were assembled by hand at BMW Motorsport in Garching.

1988 US-Spec M5 with European-Spec headlights
With a total production of 2,191 the E28 M5 remains the rarest regular production BMW Motorsport car.
Specification
DC91: (LHD EURO) => M88/3 engine 286 hp (DIN) 588 Units produced
DC92: (RHD EURO) => M88/3 engine 286 hp (DIN) 187 Units produced
DC93: (LHD US) => S38B35 engine 256 hp (SAE) 1,320 Units produced
DC98: (RHD SA) => M88/3 engine 286 hp (DIN) 96 Units produced (DC98 and DC99)
DC99: (RHD SA) => M88/3 naucer engine 286 hp (DIN)
Performance
At the time of sale, BMW quoted the following (relatively poor) 0-60 times to give the impression that the E28 M5 did not outperform the more expensive, heavier and top-of-the-range E24 M635csi.
(Euro) - 286 hp 0-60 mph - 6.2 s. Top Speed: 153 mph
(USA) - 256 hp 0-60 mph - 6.5 s. Top Speed: 148 mph
Special versions
Whilst BMW Motorsport did not build any special versions of the E28 M5, the German tuner Hartge produced the Hartge H35S-24, a 330 PS (325 hp/243 kW) version of the E28 M5. Main modifications over and above the standard E28 M5 were revised cams, a modified exhaust, modified Motronic ECU programming and a revised (and lowered) suspension setup.
Alpina limited their tuning efforts to the older M30 engine powered models.
Alpina B7 Turbo 600-750hp (0-60: 4,7 sec, 168mph)

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