<P> For the final year , 1987 , Buick introduced the limited production GNX , for `` Grand National Experimental '' , at $29,900 . Made in partnership with McLaren Performance Technologies / ASC , Buick produced only 547 GNs with the interior trim package , that were then sent off to McLaren and upgraded into the Buick GNX . Buick underrated the GNX at 276 hp ( 280 PS ; 206 kW ) @ 4400 rpm and a very substantial 360 lb ⋅ ft ( 488 N ⋅ m ) @ 3000 rpm of torque ( actual output is 300 bhp ( 304 PS ; 224 kW ) and 420 lb ⋅ ft ( 569 N ⋅ m ) . This was created to be the `` Grand National to end all Grand Nationals . '' Changes made included a special Garrett AiResearch T - 3 turbocharger with a ceramic - impeller blowing through a more efficient and significantly larger capacity intercooler with a `` Cermatel ( ceramic - aluminum ) coated '' pipe connecting the intercooler to the engine . A GNX specific E-EPROM , low - restriction exhaust with dual mufflers , reprogrammed turbo Hydramatic 200 - 4R transmission with a custom torque converter and transmission cooler , and unique differential cover / panhard bar included more of the performance modifications . Exterior styling changes include vents located on each front fender , 16 inch black mesh style wheels with VR - speed rated tires , and deletion of the hood and fender emblems . The interior changes of the GNX included a serial number on the dash plaque and a revised instrument cluster providing analog Stewart - Warner gauges , including an analog turbo boost gauge . Performance was measured faster than the Ferrari F40 and the Porsche 930 with a quarter mile time of 12.7 seconds at 113.1 mph ( 182 km / h ) ( 0.3 and 0.8 seconds quicker , 2.9 and 13.3 mph faster ) and a 0 - 60 mph ( 97 km / h ) time of 4.6 seconds ( 0.4 and 0.3 seconds quicker , respectively ) . GNX # 001 is the 1986 prototype currently owned by Buick and sometimes makes appearances at car shows around the US . The GNX used a unique torque arm that was mounted to a special , GNX only , rear differential cover , for increased traction . The torque arm rear suspension alters the suspension geometry , making the body lift while planting the rear tires down , resulting in increased traction . </P>
<P> For the final year , 1987 , Buick introduced the limited production GNX , for `` Grand National Experimental '' , at $29,900 . Made in partnership with McLaren Performance Technologies / ASC , Buick produced only 547 GNs with the interior trim package , that were then sent off to McLaren and upgraded into the Buick GNX . Buick underrated the GNX at 276 hp ( 280 PS ; 206 kW ) @ 4400 rpm and a very substantial 360 lb ⋅ ft ( 488 N ⋅ m ) @ 3000 rpm of torque ( actual output is 300 bhp ( 304 PS ; 224 kW ) and 420 lb ⋅ ft ( 569 N ⋅ m ) . This was created to be the `` Grand National to end all Grand Nationals . '' Changes made included a special Garrett AiResearch T - 3 turbocharger with a ceramic - impeller blowing through a more efficient and significantly larger capacity intercooler with a `` Cermatel ( ceramic - aluminum ) coated '' pipe connecting the intercooler to the engine . A GNX specific E-EPROM , low - restriction exhaust with dual mufflers , reprogrammed turbo Hydramatic 200 - 4R transmission with a custom torque converter and transmission cooler , and unique differential cover / panhard bar included more of the performance modifications . Exterior styling changes include vents located on each front fender , 16 inch black mesh style wheels with VR - speed rated tires , and deletion of the hood and fender emblems . The interior changes of the GNX included a serial number on the dash plaque and a revised instrument cluster providing analog Stewart - Warner gauges , including an analog turbo boost gauge . Performance was measured faster than the Ferrari F40 and the Porsche 930 with a quarter mile time of 12.7 seconds at 113.1 mph ( 182 km / h ) ( 0.3 and 0.8 seconds quicker , 2.9 and 13.3 mph faster ) and a 0 - 60 mph ( 97 km / h ) time of 4.6 seconds ( 0.4 and 0.3 seconds quicker , respectively ) . GNX # 001 is the 1986 prototype currently owned by Buick and sometimes makes appearances at car shows around the US . The GNX used a unique torque arm that was mounted to a special , GNX only , rear differential cover , for increased traction . The torque arm rear suspension alters the suspension geometry , making the body lift while planting the rear tires down , resulting in increased traction . </P>
how many buick grand national gnx were made
how many buick grand national gnx were made
547
547