GM Alloytec Engines

The GM XE range of engines has now been replaced by the all new "Alloytec" range.

Available in either 2.8l V6 turbo or 3.6l normally aspirated version, both feature all aluminium construction and variable valve timing. The turbo engines are used in GM Vectra and Saab models, while the 3.6l normally aspirated versions are used in Cadillac's and Holden's in Australia.

The latest VXR Vectra uses a 312bhp version of the engine, with an innovative twin scroll turbo. This allows both banks of the engine to feed independantly into a single turbo charger unit, which is mounted above the gearbox for ease of packaging.


The normally aspirated engine has already been used succesfully in motorsport applications in the Australian F3000 Championship mated to a Reynard carbon chassis and Hewland motorsport gearbox. Engines feature individual throttle bodies, dry sump lubrication and Motec engine management system.

Caral Automotive are able to source both of these powerplants direct from GM, and to integrate them into the Caral V6XS-Sport and Exige packages mated to a Getrag  6 speed transaxle. We have also developed a clone engine loom which allows the turbo engine to be run with the OE engine mangament system.

Following a collaboration between GM and Alfa Romeo, a modified version of the Alloytec engine is found in the latest Alfa Romeo Brera models in 3.2l configuration and featuring direct petrol injection and "twin phaser" technology.