BMW N63 Engine: Notes

As the successor to the N62 engine, the N63 was developed based on the principles of "Efficient Dynamics". Efficient Dynamics combines driving enjoyment with efficiency which, in a new engine, is expressed in increased power output together with reduced fuel consumption.

One of the ways of achieving this objective is through downsizing. This means the same power output is achieved with reduced engine displacement or higher power output at the same engine displacement.

Both objectives apply to the N63 engine. Compared to the N62 engine, the power output has been boosted while decreasing the engine displacement.

In comparison, the N62TU has a displacement of 4.8 liters, while the new N63 engine displaces only 4.4 liters.

This is primarily achieved by technologies that already gave the N54 engine its legendary dynamics and outstanding efficiency: Bi-turbocharging in connection with high precision injection.

The N63 is the first engine world-wide to feature an optimized package, involving the integration of the turbocharger and the main near-engine catalytic converters in the "v-space".

With the aim of achieving the demanding performance objectives in connection with optimum package and weight, the exhaust turbochargers and the catalytic converters have been placed in the v-space between the cylinder banks resulting in the intake and exhaust ports changing places.

With short pipe lengths and larger cross sections, this arrangement minimizes the pressure losses on the intake and exhaust side.