The BMW 5 Series E28 M5 is a high-performance variant of the E28 5 Series, produced from 1985 to 1988. It was designed as a road-going version of the Group A racing cars that competed in touring car championships during the same period.
Engine and Performance:
- The E28 M5 features a modified version of the S38 inline-6 engine, which displaces 2.9 liters and produces 282 horsepower at 7,000 rpm.
- Torque output is rated at 252 lb-ft (341 Nm) at 4,800 rpm.
- The car's curb weight is approximately 1,550 kg (3,417 lbs), with a power-to-weight ratio of around 183 hp/ton.
Transmission and Drivetrain:
- A Getrag 260 5-speed manual transmission is standard equipment.
- The rear differential features a limited-slip unit with a 25% lockup rate.
- Rear-wheel drive is the sole drivetrain configuration offered.
Chassis and Suspension:
- The E28 M5's chassis and suspension are derived from the standard E28 5 Series, but with modifications for improved handling and stability.
- Koni shock absorbers with revised valving provide damping.
- Bushings and mounting points were also reinforced to handle the increased stresses of high-performance driving.
Interior and Safety Features:
- The cabin is appointed with a range of optional features, including leather upholstery, power steering, and a Hi-Fi sound system.
- A driver's airbag was standard equipment from 1985 onwards.
Brakes and Wheels:
- Four-piston Brembo brake calipers are used at the front axle, while the rears feature two-piston units.
- The car rides on unique 16x7" alloy wheels with a distinctive design inspired by aircraft landing gear.
Production Numbers:
- A total of 3,259 E28 M5s were produced during its production run from 1984 to 1988.
- Of these, approximately 1,300 cars were exported outside Germany.
Rarity and Collectibility:
- The E28 M5 is highly sought after by collectors due to its rarity and the fact that it's the rarest of all BMW M models produced during this period.
- Prices for original E28 M5s have risen significantly over recent years, with mint-condition examples selling for six-figure sums at auction.
