|Manufacturer||BMW Bayerische Motoren Werke|
The BMW S85B50 is a DOHC V10 piston engine which replaced the S62 and was produced from 2005-2010. Used in the E60 M5 sedan, E61 M5 touring and E63/64 M6 coupé, it was inspired by BMW's previous Formula 1 involvement.
As the S85 was BMW's first V10 engine, it was given a new series in the nomenclature. While V8 engines are designated by "60s" and V12 engines labeled as "70s", the S85 was badged with an "80" despite it having fewer cylinders than the "70"-series engines.
The S85 spawned a related S65 V8 engine for the 2008 BMW M3. Although the "65" designation is apparently out of order compared to the other V8 engines (which follow "62" and "63" sequentially), the S65 was badged such since its design is largely derived from the S85 minus two cylinders, and not related to BMW's other V8s.
The S85B50 is a high-revving engine designed to utilize power from a wide rev band. Having a redline of 8250 rpm, it achieves over 100 bhp (70 kW)/litre. The S85 features a very high compression ratio of 12.0:1, exceeding the previous S54's ratio of 11.5:1.
It produces over 100 hp more than the previous E39 4.9liter V8, whilst weighing only 2.2 pounds more. Unlike some other BMW engines which utilise Valvetronic to infinitely vary valve lift to eliminate the throttle plate, this engine has individual throttle bodies per cylinder.
In 2005, the first year that it was nominated, the S85B50 won four different International Engine of the Year awards in the following 4 categories:
In 2006 the S85B50 won several International Engine of the Year awards, winning in the following 3 categories:
In 2007 the S85B50 won several International Engine of the Year awards, winning in the following 2 categories:
In 2008 the S85B50 won an International Engine of the Year award, winning in the following category:
|« previous — BMW road car engine timeline, 1980s-2000s — next »|
|4-cylinder petrol||<< M10||M40||M43||N42||N43 / N45 / N46 >>|
|6-cylinder petrol||<< M20||M50||M52||M54 / M56||N52||N53 >>|
|S50 / S52||S54|
|<< M88 / M90||S38|
|8-cylinder petrol||M60||M62||N62||N63 >>|
|12-cylinder petrol||M70||M73||N73||N74 >>|
Here you can share your comments or contribute with more information, content, resources or links about this topic.