Volvo reports that the new turbocharged 2.5-L is "one of a new generation of low-friction, five-cylinder engines that are considerably lighter and more compact than previous engines of the same displacement."
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| The turbocharged 2.5-L engine's compact size also allows for improvements in weight distribution and overall weight. (Photo: Volvo Cars of Canada) |
Smaller and lighter are words that are close to the heart of import car enthusiasts, making it possible to stick a 5-cylinder engine where a 4-cylinder could only go previously. The compact size also allows for improvements in weight distribution and the obvious reduction in overall curb weight.
"Making room for a five-cylinder engine in a compact body is something of a work of art," Ewerstrand added. "We have succeeded by using new methods to reduce the exterior dimensions of the engine."
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| The space optimization of the larger engine sent Volvo engineers back to the drawing board to redesign a number of key components under the hood. (Photo: Volvo Cars of Canada) |
Some of the engine's specific space-saving modifications include exhaust manifold outlets that are angled down toward the engine block, while those same manifolds are cast together with the turbo unit housing for greater space efficiency. The size reduction program caused Volvo engineers to redesign the air conditioning compressor, alternator, and water pump, to better fit into the V50's marginalized engine bay.
The engine also features twenty valves total, plus dual overhead camshafts (DOHC) to increase output and throttle response. What's more, variable camshaft timing (CVVT) is part of the package, effectively improving power and torque while benefiting fuel economy figures as well as emissions.