Model Engine type Displacement (cc) Bore/Stroke (mm) Comp. ratio Fuel system Power Torque 0-100 km/h (s) Production
520i I6 24V 1991 80/66 1:11.0 Multiport fuel injection 110 kW (150 PS; 148 bhp) @ 5900 190 N·m (140 ft·lbf) @ 3500 10.2 (man) / 11.5 (aut) 1996–2000
520i I6 24V 2171 80/72 1:10.7 Multiport fuel injection 125 kW (170 PS; 168 bhp) @ 6250 210 N·m (150 ft·lbf) @ 3500 9.1(man) / 10.2 (aut) 2000–2003
The BMW E39 is the BMW 5 Series made between 1995 and 2003. The E39 was the successor of the BMW E34 in 1995, and itself was replaced by the E60 platform in 2003. Sales to Germany and the United Kingdom began in 1995, and by 1996 sales to the rest of the world had commenced. A mid-generational refresh appeared in 2001, featuring minute detail changes. At launch, the base model was the 520i, which developed 112 kilowatts (150 hp) in the pre-update models, and 126 kilowatts (170 hp) in later models. An M5 variant was introduced in 1998, with a 4.9 litre S62 V8 engine. All models but the M5 were available as either a sedan or a wagon, the latter called Touring.
The BMW M52 is a Straight 6 piston engine. Displacement ranges from 2000 cc to 3200 cc.
It is a DOHC 24-valve engine, originally introduced with VANOS Variable Valve Timing. It replaced the BMW M50 engine in 1994 and was replaced in 2001 with the BMW M54 engine. The world market engine used Nikasil lined aluminium cylinders instead of a cast iron sleeves used in the American market engine. The reason for this is Nikasil is eroded by the higher sulfur content fuel used in America.
In markets with low-sulfur fuel this engine was very highly regarded and the M52 was on the Ward's 10 Best Engines list for 1995 through to 1998. However, there was criticism of the M52 engine in some markets, especially the UK, which had high levels of sulfur in the petrol during the late 90's. Sulfur acts as a corrosive agent against Nikasil and led to a lot of the early engines having premature bore-liner wear. Fortunately this problem was solved in post-September 1998 cars with the introduction of steel cylinder liners, with the designation M52 TU-3. However problems are still present in these engines so affected cars of this period should be bought with caution unless the service history verifies that work was carried out to rectify the problem. The American market M52 used iron sleeves from the beginning, and so, was unaffected by this problem.
A Technical Update or M52TU version in 1999 added Double-VANOS and other modifications.
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