Buick GSX
The torque king of the muscle car era, wrapped in a gentleman's suit.
- Power
- 360 bhp
- 0–60 mph
- 5.5 s
- Top speed
- 135 mph
- Est. value
- $82k–$237k
About the Buick GSX
Introduced mid-1970 to boost showroom traffic, the GSX was Buick's ultimate performance statement. While officially rated at 360 hp to appease insurance companies, the Stage 1 package featured high-flow heads, a hotter camshaft, and a massive 455 cubic-inch V8 that produced a record-breaking 510 lb-ft of torque. This torque figure remained the highest for any American production car for over 30 years. Only 678 GSXs were built in 1970, with 400 featuring the Stage 1 engine, making it one of the rarest and most sought-after A-body muscle cars.
Buick GSX specs
The Buick GSX produces 360 bhp (268 kW) and 691 Nm (510 lb-ft) of torque. It reaches 60 mph in 5.5 seconds and has a top speed of 135 mph (217 km/h).
| Make | Buick |
|---|---|
| Model | GSX |
| Trim | 455 Stage 1 |
| Years | 1970 |
| Type | Muscle |
| Body style | Coupé |
| Country | United States |
| Production | About 678 built |
| Original price | About $4,900 when new |
| Engine | 7.5-litre V8 |
|---|---|
| Displacement | 7,456 cc (7.5 litres) |
| Induction | Naturally aspirated |
| Power | 360 bhp (268 kW) at 4,600 rpm |
| Torque | 691 Nm (510 lb-ft) |
| Redline | 5,500 rpm |
| 0–60 mph | 5.5 s |
| Top speed | 135 mph (217 km/h) |
| Transmission | 4-speed manual |
| Drivetrain | Rear-wheel drive |
| Weight | 1,701 kg (3,750 lb) |
| Power-to-weight | 212 bhp per tonne |
Typical figures for the standard car; options, markets and model years vary. Where our specs come from
How much is a Buick GSX worth?
A typical Buick GSX is estimated to be worth $82,000 – $237,000 (about £61,000 – £176,000).
Its original price when new was about $4,900.
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
Buick GSX rarity in CarSpot
The Buick GSX is a Unicorn card in CarSpot, with a rarity score of 100 out of 100. The rarest tier: hypercars, one-offs and cars built in tiny numbers, typically fewer than about 500. A Unicorn card is worth 320 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.
Buick GSX fun facts
- The 1970 GSX was only available in two high-impact colours: Saturn Yellow and Apollo White.
- Its 510 lb-ft torque record for American production cars stood until the Dodge Viper arrived in the 1990s.
- The GSX came standard with a hood-mounted tachometer, a feature usually associated with Pontiac GTOs.
