BMW E28

Infobox Automobile
name=BMW E28


manufacturer=BMW
engine = Petrol I4
1766 cc Convert|90|hp|kW|0|abbr=on - Convert|105|hp|kW|0|abbr=on
Petrol I6
1990 cc - 3453 cc
Convert|125|hp|kW|0|abbr=on - Convert|285|hp|kW|0|abbr=on
Diesel I6
2443 cc Convert|86|hp|kW|0|abbr=on - Convert|115|hp|kW|0|abbr=on
wheelbase = Auto mm|2628
length = Auto mm|4620
width = Auto mm|1700
height = Auto mm|1415
weight =
production=1981–1988 722,328 builtcite book |last=Oswald |first=Werner |authorlink= |coauthors= |title= Deutsche Autos 1945-1990, Band 4|year=1. Auflage 2001 |publisher=Motorbuch Verlag |location=Stuttgart |id=ISBN 3-613-02131-5]
predecessor=BMW E12
successor=BMW E34
related=
class=Midsize (E) luxury
similar=Mercedes-Benz W123
vehicles=BMW 5 Series
The BMW E28 automobile platform was the basis for the 1981 through 1988 BMW 5-Series automobiles. It replaced the BMW E12 in 1981 and was replaced by the BMW E34 in 1989. The E28 was the first 5-Series which BMW offered in an M version.

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

European model range

*518 M10B18 carburetted engine, produced through 9/84
*518i M10B18 fuel-injected engine, 1984 to 1987
*520i M20B20 early, fuel-injected engine, 1981-1985
*520i M20B20 late, fuel-injected engine, 1985-1987
*524d M21D24 diesel 2.4 L engine, 1983-1988
*524td M21D24 turbocharged diesel 2.4 L engine, 1983-1987
*525i M30B25 fuel-injected (LE-Jetronic) 2.5 L engine, 1981-1987
*525e M20B27 fuel-injected (Motronic) 2.7 L high efficiency engine, 1983-1988
*528i M30 fuel-injected (LE-Jetronic) 2.8 L engine, 1981-1987
*535i M30B34 fuel-injected (Motronic) 3.4 L engine.
*535is M30B34 fuel-injected 3.4 L engine, with sport seats and optional electronically controlled hydraulic automatic transmission
*M535i M30B34 fuel-injected (Motronic) 3.4 L engine, with M-Technic aerodynamic kit, sport seats and unique 390 mm alloy wheels, 1985-1988
*M5 M88/3 fuel injected 3.5 L engine, 1985-1988

North American E28 range

All North-American specification E28s (`82-`88) 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 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. Some `85 535i's were equipped with power seats.

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, Convert|114|hp|kW|0|abbr=on. Imported from 1985-1986.

*528e: Sold from 1982-1988. Equipped with a 2.7L "High Efficiency" M20 6-Cylinder engine that produced Convert|121|hp|kW|0|abbr=on but Auto ft.lbf|171|0 of torque. For the 1988 model year, the engine was revised to produce Convert|127|hp|kW|0|abbr=on, by utilizing the cylinder head from the "i" motor installed on the "e" engine block. It was affectionately known as the "super eta".

*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 Convert|181|hp|kW|0|abbr=on 3.2L M30 6-cylinder engine as fitted to the larger 633csi and 733i, it produced Auto ft.lbf|195|0. torque. The compression ratio was 8.8:1. Top Speed was 134 mph. (man.). The 533i was the fastest sedan sold in the USA in 1983.

*535i: Replaced the 533i in 1985 and sold through 1988. The 535i featured a slightly larger 3.4L M30 6-Cylinder engine with Convert|182|hp|kW|0|abbr=on and greater torque. Compression was down to 8.0:1. Top speed also dropped to 131 mph. (man.).

*535is: Straight-6 with a sport suspension and interior and exterior modifications - 182 hp (135 kW). The 535is was available from 1987-1988. It incorporated M5 styling cues: front air-dam, rear spoiler, and sport seats.
*M5: A 1988 Model-Year only car equipped with a 24-Valve DOHC Convert|256|hp|kW|0|abbr=on 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. A very small number of US spec M5s were built with black interiors. These are the most rare with a rumored 29 being built. 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 its very own 7.5 x 16" BBS Wheels (not found on any other model).

Engines

The baby six motor found in the 520i, 525e 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 325e 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 528i, 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 both 533i and 535i M30 intake manifold from 1982-1988 had a "3.2/3.5" casting. During the new intake manifold's development a 3.2 L version existed in Europe and the US, and a 3.5 L in Europe. When the 3.4 L versions came out a year later in Europe, the casting was not changed. The 3.4 L was introduced to the US in 1985. 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 3.4 L. The casting read "3.5", but it was still 3.4 L (3430 cc). For the US, the 735i and the 635 csi were the first to receive 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.Fact|date=February 2007

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.

References

External links

* [http://mye28.com MyE28.com E28 Message Board]
* [http://5erfest.net 5erFest, an annual E12 and E28 meet]
* [http://www.e28planet.com/etm.php BMW E28 Electronic Troubleshooting Manuals] - E28 Planet
* [http://www.scribd.com/doc/413516/Haynes-Repair-Manual-Bmw-e30-e28-e34 Haynes Repair Manual] - Scribd
* [http://www.bmwmregistry.com/model_faq.php?id=6 E28 - M535i]
* [http://www.bmwmregistry.com/model_faq.php?id=7 E28 - M5]


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