The Volvo 850 was in production from 1992 to 1997 and used a variety of 20 valve, inline five engines. Volvo produced turbo and non-turbo engines over the course of the 850's production, using five different engines across the range of cars available under the "Volvo 850" model name.
The B5204S engine was used from 1992 and continued through 1994. It produced a maximum of 141bhp at 6500rpm and a maximum torque of 130 lp ft at 3800rpm. The B5204S introduced the five-cylinder inline design common to all 850 engines, with a 2.0 litre engine and four valves per cylinder. It has a compression ratio of 10.3:1.
The B234T is a 2.3 litre engine with a five-cylinder inline design and four valves per cylinder. It is one of the more high-powered engines used in the 850 range, with a maximum torque of 100kg ft between 2000 and 5280rpm. Its maximum bhp is 222 at 5280rpm. It has a compression ratio of 8.5:1. The B5234T was available from 1994 and was later replaced by the slightly lower powered B5254T.
The B5252S is an unusual engine in the Volvo 850 range, having employed only two valves per cylinder instead of the usual four. It is a 2.5 litre engine with the usual transversal mounting and 5 cylinder inline design. The engine produced a maximum torque of 68.9kg ft at 3600rpm and 138bhp at 5400rpm. It has a compression ratio of 10.0:1 and is the lowest powered engine in the 850 range.
The B5254S is basically a higher-powered B5252S. It uses the standard five-cylinder inline with four valves per cylinder, giving it significantly more power than its sister engine. The B5254S produces a maximum torque of 73.5kg ft at 3300rpm and 168bhp at 6200rpm. It has a compression ratio of 10.5:1.
The B5254T engine type was introduced late into production of the Volvo 850 range in the 850 AWD (all wheel drive) models; although it also saw use in other 850 production models. This 2.5 litre engine features a maximum torque of 90.3kg ft between 1800 and 5000rpm and 193bhp at 5100rpm. It employed the standard 850 model five cylinder inline design, mounted transversally, with the usual four valves per cylinder. The engine rivals the earlier B5234T but emphasises ride comfort instead of overall high performance.
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