MGA Chassis & Engine Numbering

This page is not intended to be a definitive guide to engine and chassis numbering but it should help as a guide making an initial identification of a car.

1500 Chassis numbers – nb. The numbers on early 1500 cars had the prefix ‘BP’:

1600 Chassis numbers:

Twin-Cam chassis numbers:

Engine numbers:

For more information on locating the chassis number and other identification marks on an MGA CLICK HERE.

More information on engine numbers can be found on the ‘MGA Guru’ website – CLICK HERE to go to the relevant pages.

To access a list of PRODUCTION CHANGES for MGAs by date, chassis & engine numbers CLICK HERE.

To access a list of BMC engine codes CLICK HERE

To read/download the January 2026 e-Newsletter article on chassis & engine numbers CLICK HERE

In July 1990 there was a high profile court case concerning the originality of a historic competion Bentley known as “Old Number One”. To read the court judgement CLICK HERE