The Stag type was created by the British Triumph Motor Company between 1970 and 1978, and it had numerous engine problems almost right away. This was because “low compression pistons had to be installed to meet California’s low octane fuel requirements and the associated advance in ignition timing to meet the USA’s constantly changing emission regulations,” according to the report. The engine produced more heat as a result, and when an automatic transmission and air conditioning were installed, the engine’s cooling capacity was significantly reduced. Even though American cars were equipped with engine cowls to try and make up for it, motorway backups frequently led to engine overheating.