E28 Alpina B7 Turbo

This is the second-generation B7 Turbo, introduced in April 1984. Once again a car with the name B7 Turbo held the title of being the fastest 4-door car in the world. The production ended in July 1987 and a total of 236 cars were built. In August 1986, Alpina introduced the B7 Turbo Kat which were based on the E28 M5 shell powered by a 320 hp (239 kW) 510 Nm. engine based on the M106 engine. The B7 Turbo Kat went out of production in December 1987. Only 42 B7 Turbos with catalyst were made.

Engine/Gearbox

The engine was based on BMW´s 3.5 liter unit, which in standard version produced 218 bhp. Alpina had made many changes to the engine such as a reprogrammed Motronic system, a modified cylinder-head, lighter Mahle-pistons, a new camshaft, a special exhaust manifold and of course a KKK K27 turbocharger. The engine had higher compression than the old B7 Turbo so Alpina had decreased the turbo boost to 0.7 bar, because they didn’t want the B7 to have more than 300 bhp. That´s exactly what it had. 300 bhp and a torque of 501 Nm. The catalyst-version had 320 bhp and a torque of 509 Nm. The gearbox was a five-speed from Getrag.

Suspension/Brakes/Wheels

The B7 Turbo had the excellent Alpina-Bilstein suspension with progressive springs and gas-pressure dampers. The brakes were more powerful thanks to Girling discs all-around, ventilated at the front. The wheels were 16 inches with 205/55 tires at the front and 225/50 tires at the rear.

Interior/Exterior

The B7 had all of the usual Alpina interior changes such as Recaro seats with Alpina upholstery, leather steering-wheel, gear knob, new instruments and so on. The visual changes included a deep front spoiler, rear spoiler and the wheels.

Performance

Depending on what year the car was manufactured Alpina had claimed different 0-100 km/h times. When Auto Motor und Sport tested the B7 Turbo Kat it accelerated from 0-100 km/h in 6.1 seconds, 0-160 km/h in 12.8 seconds and had a top speed of 265 km/h. But when the Swedish magazine Teknikens Värld tested the B7 Turbo it accelerated from 0-100 km/h in an amazing 4.8 seconds, 0-200 km/h in around 17 seconds and had a top speed of 270 km/h.

1984 Alpina B7 Turbo Specifications

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