Registered: April 2008
My 1971 Buick Gran Sport
1971 was the official beginning of the end of the muscle car era. Pressured by increasing government regulations and increasing insurance premiums and gasoline prices, GM decreed that all its engines must run on low-lead gasoline, leading to a drop in compression ratios and a corresponding drop in power ratings. The 350 engine lost 55bhp to 260bhp while the 455 and 455 Stage 1 lost 35bhp and 15bhp to drop to 315bhp and 345bhp respectively.
The compression ratio was reduced by 15%, which was the main reason for the power reduction. Make no mistake these machines were still able performers on both street and strip.
The GSX trim package was now available in a wide range of colors, including red and black.
GS 2D Hardtop: 8,268
GS Convertible: 902
350 V8 260 bhp @ 4,600rpm, 360 lb-ft @ 3,200 rpm.
455 V8 315 bhp @ 4,400rpm, 450 lb-ft @ 2,800 rpm.
455 Stage 1 455 V8 345 bhp @ 5,000rpm, 460 lb-ft @ 3,000 rpm.
455/315: 0-60 in 6.9 sec, 1/4 mile in 15.3 sec @ 96 mph.
My car's color is still 'Bittersweet Mist' as seen in the pictures..