BMW E28

From Wikipedia, the free encyclopedia

BMW E28

Manufacturer:	BMW
Production:	1982–1988
Predecessor:	BMW E12
Successor:	BMW E34
Class:	Midsize (E) luxury
Similar:	Mercedes-Benz W123
Vehicles:	BMW 5 Series

The BMW E28 automobile platform was the basis for the 1981 through 1987 BMW 5-Series automobiles. It replaced the BMW E12 in 1981 and was replaced by the BMW E34 in 1988. The E28 was the second 5-Series which BMW offered in an M version.

E28 Production started in 1981 and ended in December of 1987. The E28 was sold in North America as a 1988 Model Year car while Europe received the E34.

1 European Model Range
2 North American E28 Range
3 Trivia
4 External links

[edit] European Model Range

518 Carburetted 1.8L M10 4-Cylinder engine. Produced through 9/84
518i Fuel-Injected 1.8L M10 4-Cylinder engine.
520i Fuel-Injected 2.0L M20 6-Cylinder engine.
524d Diesel 2.4L Engine
524td Turbocharged Diesel 2.4L engine
525i Fuel-Injected 2.5L M30 6-Cylinder engine
525e Fuel-Injected 2.7L M20 High-Efficiency 6-Cylinder engine. European Version of the North American 528e
528i Fuel-Injected 2.8L M30 6-Cylinder engine.
535i Fuel-Injected 3.4L M30 6-Cylinder engine.
535is Fuel-Injected 3.4L M30 6-Cylinder engine. A 535i with sport seat, optional electronically controlled hydraulic automatic transmission.
M535i Fuel-Injected 3.4L M30 6-Cylinder engine. A 535i with M-Technic aerodynamic kit, sport seats and unique 390mm alloy wheels.
M5 Fuel-Injected 3.5L M88/3 6-Cylinder engine.

[edit] North American E28 Range

All North-American specification E28s were comprehensively equipped. Power windows, central locking, air conditioning, power sunroof, cruise control, alloy wheels and fog lights were standard. In addition the 533i, 535i, 535is and M5 came standard with leather upholstery and on-board trip computer.

A 3-speed automatic was offered in the 528e in 1982-1983. It was also offered in the `83 533i. By 1984, the 4-speed version was introduced to both models. In 1986, the EH version was available in the 528e and 535i. It featured a 3-mode switch: E, S, 3-2-1.

Automatic transmission and limited-slip differential were optional on all models except the M5 and 524td. The 524td was only imported with an automatic transmission, and the M5 was only imported with a manual transmission.

Heated seats were optional in Canada and available in the USA only as an option on the M5. Consequently, few if any M5s were delivered without heated seats.

Leather upholstery and an on-board trip computer were optional on the 528e and 524td.

From 1985 All E28s sold in North America had ABS Brakes as standard.

From 1986 All E28s sold in North America had power-adjustable front seats as standard as well as an upgraded stereo.

524td: M21 2.4 L Straight-6 Turbodiesel engine, 114 hp. Imported from 1985-1986.

528e: Sold from 1982-1988. Equipped with a 2.7L "High Efficiency" M20 6-Cylinder engine that produced 121hp but 171 lb-ft of torque.

533i: A North-American only model sold from 1983-1984 in limited quantities in response to customer complaints that the 528e had lower performance figures than the 1981 528i that it replaced. Equipped with a 181hp 3.2L M30 6-cylinder engine as fitted to the larger 633csi and 733i. The 533i was the fastest sedan sold in the USA in 1983.

535i: Replaced the 533i in 1985 and sold through end of production. The 535i featured a slightly larger 3.4L M30 6-Cylinder engine with 182hp and greater torque.

535is: Straight-6 with a sport suspension interior and exterior modifications - 182 hp (135 kW)

M5: A 1988 Model-Year only car equipped with a 24-Valve DOHC 256hp 3.5L S38 engine. Limited in production the M5 was built from 11/86-11/87. The M5 was hand-assembled at BMW Motorsport in Garching, Germany. The M5 was available in America in Jet Black with Natur (Light Saddle) leather. The M5 also had leather door panels, lower dash and center console. Canadian-specification M5s were available with the option of a black leather interior. The M5 was equipped with it's very own 7.5 x 16" BBS Wheels (not found on any other model).

The baby six motor found in the 524td and 528e models is known as the "M20", a 12 valve SOHC inline six cylinder design. It had seven main bearings and seven cam shaft bearings, a rocker arm type valvetrain driven by a composite rubber timing belt. US market M20's came with cast aluminum acoustically tuned, common plenum intake manifolds and a single throttle body. This motor was first available in the European market for model year 1976 in a 2.0 L carbureted version. It later grew to 2.3 L in the E21 323i, then 2.5 L in the E30 325i and also 2.7 L in the 325 and 528e models. It is also very similar to the later 24 valve motors as in the E36 and E46 3 series models, with the same basic block dimensions.

The big six motor found in the 533i and 535i/is models is known as the "M30". The M30 is also a 12 valve SOHC inline six cylinder design. It has seven main bearings, four camshaft bearings and a rocker arm type valvetrain. US M30's also came equipped with cast aluminum acoustically tuned common plenum intake manifolds and single throttle bodies. Unlike the M20 it has a chain-driven valvetrain. Its larger dimensions allow for a longer stroke and larger bore, which makes for almost 3.5 L displacement in later motors.

It should be noted that the M30 intake manifold from 1982-1988 had a "3.2/3.5" casting. During the new intake manifold's development a 3.2L version existed in Europe and the US, and a 3.5L in Europe. When the 3.4L versions came out a year later in Europe, the casting was not changed. 1988, was the last year this manifold casting was used in the E28 535i and 535is. A new style intake manifold was designed for the new 3.5L. The casting read "3.5". For the US, the 735i and the 635 csi were the first to recieve the new M30 in 1988.

The M5 came with a big six motor known as the "S38". This motor is similar to the M30, but has a 24 valve cylinder head, duplex timing chain, dual overhead cam layout and shim and bucket style valvetrain. In addition to the top end revisions, the S38 also had six individual throttle bodies and intake trumpets fed by a cast aluminum intake plenum. This motor was designed for high power and durability at very high engine speeds. In the E28 chassis it was one of the fastest sedans in the world for its time, and it remains legendary among enthusiasts today.^{[citation needed]}

[edit] Trivia

Ford purchased BMW 524td diesel engines and used them in their Lincoln LSC coupe for about three years. The same engines were also used in the Vixen 21TD motorhome.
The letter 'e' in 528e stands for the Greek letter 'eta' and implies 'efficiency'.
The US M5 was only available in black with tan interior. Canadian vehicles were optioned with a black interior.