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E90 320si
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  BMW E90 320si
 

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Country of origin:Germany
Produced in:2006
Numbers built:2600
Source:Company press release
Last updated:December 12, 2005
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Click here to download printer friendly versionHot on the heels of Team BMW UK's Andy Priaulx claiming the FIA World Touring Car Championship, BMW has announced details of a limited-edition version of BMW's 2006 World Touring Car - the new BMW 320si Saloon.

Designed to comply with FIA homologation regulations, only 2,600 cars will be sold worldwide. All feature a hand-built four-cylinder engine made at BMW's engine plant at Hams Hall, near Coventry. The high revving 2.0-litre unit delivers 173hp at 7,000rpm (before reaching its red line at 7,300rpm) and 200Nm of torque at 4,250rpm.

This engine powers the BMW from zero to 62mph in 8.1 seconds and, if left unchecked, onto a top speed of 140mph. Although inspired by the racetrack, the car still delivers 31.7mpg on the combined cycle and conforms to the EU4 emissions regulations.

This high level of performance has been achieved using BMW's motorsport technology. Compared with the 'standard' BMW 320i, the engine has been significantly modified with larger induction and exhaust valves to increase airflow. The cylinder bore has increased by 1mm to 85mm while the stroke has been reduced by 2mm to 88mm.

The compression ratio of the engine has also been increased from 10.5:1 to 11.0:1, helping to boost power by 23hp over the 320i. Additionally, instead of running with grey-cast-iron cylinder liners, the pistons run in special aluminium-alloy liners in the cylinder block. Engineers have also decided to remove BMW's patented VALVETRONIC induction system, reverting to a conventional throttle due to the higher engine speeds demanded by a racing engine.

In a direct link with BMW's motorsport programmes, the cylinder head is cast at BMW's Landshut foundry alongside Formula One engine blocks. Additionally, to save approximately 10kgs of weight and lower the car's centre of gravity, the cylinder head cover is made of carbon fibre.

The new BMW 320si mates its high levels of performance with World Touring Car looks. The specification of the 320si is based on the 3 Series M Sport model that includes front and rear aerodynamic body styling, sports seats, sports suspension and aluminium interior trim. Additionally, the BMW 320si features Touring Car-style alloy wheels with BMW Motorsport motif. The front wheels are 8J x 18 fitted with 225/40 R18 tyres while at the rear the 8.5J x 18 wheels are fitted with 255/35 R18 tyres. Finally, mirror caps finished in satin chrome differentiate the car from a standard 3 Series.

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  Article Image gallery (6) Specifications User Comments (2)