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A warm welcome to
Richard Stewart Williams Ltd

World-renowned classic Aston Martin Heritage specialists since 1968

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6 Cylinder

Conversion - 6 Cylinder - 1With over 45 years of engineering and motor racing experience with Aston Martins, the name Richard Stewart Williams is synonymous with performance – performance that has been demonstrated from club and historic racing through to the Aston Martin factory World Sports Car Championship effort including the Le Mans 24 hours.

Using this unique development experience, we are proud to offer our customers various options to improve their six cylinder cars.

We can offer various specifications in rebuilding your 6 cylinder engine. The unit can be Conversion - 6 Cylinder - 2rebuilt in 3.7 or 4.0 litre form. Alternatively we can enhance your car’s performance by converting to 4.2 or even 4.7 litres

All engine conversions include the necessary changes to run on unleaded fuel.

Each unit is run in and then power-tested on our dynamometer prior to installation.

Take a look at the power output graphs for our 4.2 litre and 4.7 litre engines below. Our 4.2 litre upgrade puts out 290 bhp and 295 lb ft while our 4.7 litre unit packs a mighty 330 bhp and 335 lb ft.

We also offer some superb handling and brake upgrades to cope with your car’s added performance. To discuss your requirements, further please contact either Neil Thompson or Richard Williams.

4.2 Litre

4.7 Litre