Citroën GS Birotor
The smooth, short-lived rotary experiment that nearly bankrupted Citroën.
- Power
- 107 bhp
- Top speed
- 109 mph
- Est. value
- $10k–$39k
About the Citroën GS Birotor
The GS Birotor was a bold attempt to marry Citroën's legendary hydropneumatic comfort with the smoothness of a Wankel rotary engine. Developed via the Comotor joint venture with NSU, it featured a twin-rotor unit that offered significantly more power than the standard GS but suffered from poor fuel economy and reliability issues. Launched just as the 1973 oil crisis hit, its high price and thirst led to a commercial disaster. Fearing massive warranty liabilities, Citroën attempted to buy back and scrap every example, making the few hundred survivors among the rarest and most sought-after post-war Citroëns.
Citroën GS Birotor specs
The Citroën GS Birotor produces 107 bhp (80 kW) and 137 Nm (101 lb-ft) of torque. It has a top speed of 109 mph (175 km/h).
| Make | Citroën |
|---|---|
| Model | GS Birotor |
| Trim | Wankel |
| Years | 1973–1975 |
| Type | Classic |
| Body style | Coupé |
| Country | France |
| Production | About 847 built |
| Engine | 1,990cc Comotor Type 624 twin-rotor Wankel |
|---|---|
| Displacement | 1,990 cc (2.0 litres) |
| Induction | Naturally aspirated |
| Power | 107 bhp (80 kW) at 6,500 rpm |
| Torque | 137 Nm (101 lb-ft) |
| Redline | 7,000 rpm |
| Top speed | 109 mph (175 km/h) |
| Transmission | 3-speed semi-automatic |
| Drivetrain | Front-wheel drive |
| Weight | 1,140 kg (2,513 lb) |
| Power-to-weight | 94 bhp per tonne |
Typical figures for the standard car; options, markets and model years vary. Where our specs come from
How much is a Citroën GS Birotor worth?
A typical Citroën GS Birotor is estimated to be worth $10,000 – $39,000 (about £7,500 – £29,000).
Values are directional estimates for a typical example, not appraisals. Condition, mileage, history and specification all change what a real car is worth. Pound figures use the exchange rate of 3 November 2026. How values are estimated
Citroën GS Birotor rarity in CarSpot
The Citroën GS Birotor is an Epic card in CarSpot, with a rarity score of 68 out of 100. Supercars and serious performance cars, typically worth around £100,000 to £250,000. An Epic card is worth 80 XP.
Each model's tier starts from a 0–100 score based on its value plus its power or production numbers. Once enough players have spotted a model, how often it is spotted can move it up or down one tier. How CarSpot rarity works
Rarity is a collectible game mechanic, not an assessment of real-world scarcity or value.
Citroën GS Birotor fun facts
- Citroën attempted to buy back and crush all 847 units to avoid supporting the complex engine; only about 250 are believed to have escaped the hydraulic press.
- The Birotor was so expensive to produce that it was priced similarly to the flagship Citroën DS, despite being based on a smaller family car.
- To accommodate the wider rotary powertrain and larger tyres, the Birotor features distinctively flared wheel arches and unique five-lug wheels.