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Brief description B284

Brief description B284


Petrol engine

The B284 is a turbocharged, 2.8 litre, V6 engine made solely of aluminium with 60° between the cylinder banks, four valves per cylinder and two chain-driven camshafts per bank. The firing order is 1-2-3-4-5-6. The front cylinder bank has even numbers (2-4-6) while the rear has odd numbers (1-3-5).

The turbocharger, known as a "twin scroll" turbocharger, is a relatively new type for petrol engines. "Twin scroll" means that the turbine housing is divided into two spirals - one fed from the front cylinder bank and the other fed from the rear cylinder bank. The compressor has a standard design.

In order to achieve better performance, lower fuel consumption and low emissions, the engine is equipped with continuous variable cam phasing (CVCP). With CVCP, the engine's intake camshafts can be adjusted to generate the best function. These adjustments occur hydraulically.

The engine comes in two variants: B284E (Switzerland only) with maximum power of 230 hp and maximum torque of 330 Nm and B284L with maximum power of 250 hp and maximum torque of 350 Nm. The basic engine of the two variants is the identical. It is that software that governs the performance level.