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Went with friend tonight to look at a 96 Volvo 850 estate. Owner not sure if 10v or 20v. How does one tell the difference?
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Tell at a glance.
The 10v has a Bendix coil and Fenix engine management with a MAP sensor.
The 20V is Bosch engine management and has a MAF sensor in the intake.
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IIRC the 20v has "20v" written on the engine cover and the other does not.
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IIRC the 20v has "20v" written on the engine cover and the other does not.
That could be the case, but I wouldn't trust it. I reckon the covers could be interchangable and people do 'swap' things about.....
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From the VIN plate you can deduce the engine code, and from the engine code you can deduce the number of valves; for example B5254S means benzine (petrol), 5 cylinders, 2.5 litre, four valves per cylinder (so 20 valves in all), normally aspirated. B5252S means as just written but 2 valves per cylinder, so 10 valve in all. A "T" at the end means turbocharged. Even if the engine has been swapped, then so long as you find the engine type written on it you can deduce the number of valves from this information.
Read more, including how to decode the VIN plate at www.volvoclub.org.uk/850plates.shtml
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