The E28 M5 is a 4 door sedan equipped with the powerful 286 HP (210kW) four valve per cylinder six cylinder engine originally developed for the mid-engined M1 supercar and featured in the M6 coupé. 

The BMW M5 E28 model was first shown at the Automobilsalon in Amsterdam.

Only 2180 units were ever built, of which 1235 were imported to the US. The US Models were equipped in black with a tan interior, while the European versions were made in a wide range of colors. They were all hand assembled by BMW Motorsport.

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The M5 is capable of a 245 km/h (155 mph) top speed figure, higher than any other series production 4-door at the time.

From a quick glance, the car looks from the outside just like a 520i with wider wheels. 

A review commented, "the M5 is capable of driving at top speed without making the driver feel nervous, with commendable straight line stability, flat and unperturbed even on fast autobahns curves which wouldn't be considered as such by most cars". 

The engine is a water cooled in-line six cylinder engine with seven main bearings. It has chain-driven double overhead camshafts with four valves per cylinder, a thermostatically controlled electrical radiator fan, a Bosch Motronic electronically controlled ignition and fuel injection.

The M5 has rear wheel drive, a fully synchronized 5 speed gearbox, and a hydraulically operated single dry plate clutch. 

It has an independent MacPherson strut front suspension with anti-roll bar and an independent trailing arm rear suspension with anti-roll bar.