The Citroën M35 was a coupé derived from the Ami 8, and equipped with a Wankel engine and a hydropneumatic suspension.

The bodies were produced by Heuliez from 1969 to 1971.The longitudinally mounted rotary engine had a nominal capacity of 498 cc delivering 49 bhp (37 kW; 50 PS) and 50 lb⋅ft (68 N⋅m) of torque.

The engine was so smooth running that Citroën fitted an audible alarm that went off as the car approached its redline of 7,000 rpm.

[4] The M35 was an experimental vehicle and was not officially sold - rather it was supplied to loyal Citroën customers to get their comments on the usability of the design.

Due to its experimental status, each car featured a banner at the bottom of the rear window which read in French “This Citroën M35 prototype fitted with a rotary piston engine is undergoing long term testing at the hands of a Citroën customer.”.