Automirage S4R was similar to S3R, but has four wheels. It was available with two engines: the first was 49 cc (Motobécane) and the second was 125 cc (B.C.B.); the transmission was in both cases automatic.
The bodywork was made of fiberglass and the chassis was steel, with independent front suspension and rigid rear axle. Traction was on the rear axle. The drum brakes had hydraulic control and the steering was rack and pinion.
The tires were 4.00×10, there were two seats and the curb weight was 300 kg. This little car was 2.27 m long, 1.24 m wide and 1.41 m high; the two doors had longitudinally sliding glass to facilitate ventilation.