The Alpina B9 was built in a small series from November 1981 to December 1985 on the basis of the BMW E28. In addition, only 577 copies of the B9 were produced - a rarity.
The B9 is based on the 528i, whose M30-2.8-litre BMW engine was replaced by a 3.45-litre. Alpina tuned engine. The motor is based on the 3.5-liter version of the M30, but has been extensively modified, which made it possible to remove 245 horsepower, respectable by the standards of the 1980s. Alpina replaced the cylinder head, pistons, camshaft and modified the Bosch Motronic ECU. The engine transmits its power to the rear wheels via a 5-speed gearbox, an automatic transmission was also available. The suspension of the E28 has been modified with Bilstein gas dampers, as standard the B9 was delivered with 16-inch wheels (see picture). Alpina also modified the interior with among other things, Recaro seats, a new shifter and a modified instrument cluster.
The B9 3.5 Coupe was introduced in 1982 as the successor to the 630 CS B2.
The engine is identical to that of the E28 B9 3.5 and is based on BMW`s 3.5 litre unit some relatively minor modifications. Read more
The manual 5-speed gearbox is made by Getrag.
The B9 3.5 Coupe uses the Alpina-Bilstein suspension with progressive springs and gas-pressure dampers. Behind the 16” Alpina alloys with 205/55 tires front and 225/50 rear are ventilated discs all around.
The car has Recaro sport-seats. It also have a leather-covered steering-wheel and new instruments. Exterior changes include a new front spoiler and rear spoiler.
In Auto Motor und Sport`s test the B9 accelerated from 0-100 km/h in 7.2 seconds and had a top speed of 238.4 km/h.