The GTO was introduced in 1964 as a performance option for the Tempest in convertible, coupe and hardtop form. Standard equipment included 389 V8 which developed over 325 hp. Moreover, the package included a four-barrel carburetor, dual exhaust premium tires and a close ratio steering rack.

The hottest version of the GTO included a tri-power carburetion setup. Three vacuum powered Rochester carburetors increased the power to an astonishing 348 horsepower. In 1967 GM made a corporate ban on multi-carburetor engines. This put an end to the legendary tri-power GTO.

In total over 32 000 GTOs were sold in its first year. Largely helping sales was the low $300 price for the Tempest GTO. Quickly, the GTO became a major success, defining and motivating an upcoming market of muscle cars.

In Detail

submitted by	Richard Owen
price $	$2796 USD
engine	V8
position	Front Longitudinal
aspiration	Natural
valvetrain	Pushrod Operated OHV, 2 Valves per Cyl
displacement	6375 cc / 389.0 in³
bore	103.12 mm / 4.06 in
stroke	95.2 mm / 3.75 in
compression	10.75:1
power	242.4 kw / 325 bhp
specific output	50.98 bhp per litre
torque	580.29 nm / 428.0 ft lbs @ 3200 rpm
body / frame	Steel
driven wheels	RWD
f brake size	mm / in
r brake size	mm / in
gear ratios	:1