In 1957 AC introduced its Model 57 (or Acedes) 3-wheeler for invalids. These microcars were sold by the Ministry of Health as a government help after the Wold War II.
The Model 57 was fitted with an all aluminium body and the 147 cc Villiers 30C two-stoke single cylinder of motorcycle heritage. The car has only one place and a place for a wheelchair to be stowed beside the driver. Most of Model 57 Invacars had a hard top, but there were cars with a soft folding top. All versions got steel pressed wheels where by the single front wheel was powered. Later it was replaced by the Invacar Model 70 with a fiberglass body.