 The Allegro used front-wheel drive, using the familiar A-Series engine with a sump-mounted transmission.The higher-specification models used the SOHC E-Series engine (from the Maxi), in 1500 cc and 1750 cc displacements.The two-box saloon bodyshell was suspended using the new Hydragas system (derived from the previous Hydrolastic system used on the 1100/1300).