Editing Jaguar XK engine (section)

===Fuel system===
The pre-[[fuel injection|injection]] cars had either two or three [[SU carburettor|SU]], [[Weber carburetor|Weber]], [[Zenith Carburettor Company (British)|Zenith or Zenith-Stromberg carburettors]] of various sizes depending upon the model and market, although Weber carburettors were only available from the dealer or on the aftermarket, and not supplied by the factory. The exception to this was 2.4 litre cars up to the introduction of the 240, these earlier cars having twin [[Solex Carburetor|Solex]] downdraught carburettors. Some D-Type sports racing cars received fuel injection, but it did not become available on the road cars until 1978, beginning on certain US market models in order to comply with government fuel-efficiency standards. It was eventually extended across the range and to all markets.