The 1973 Grand Prix was not only stylish and luxurious but also had the signature sporty flair to it. It didn’t compromise with the power or performance either. The ’73 GP was truly an extraordinary car. The 1973 GP came equipped with a standard four-barrel 400 cubic inch Pontiac V8 engine with a compression ratio of 8:1 that made for 230 horsepower and 325 lb-ft of torque mated with a Turbo 400 automatic transmission. The best-selling SJ model was insanely fast. It came with a larger four-cylinder 455 cubic inch V8 engine that churned 250 horsepower with 370 lb-ft of torque, a rally gauge cluster, and a Radial Tuned Suspension which also included stiffer shocks, bigger front sway bars, and special coil springs. Despite the performance drops and heavily modified design, the model was a success during the year.