special clock delete plate was added to the instrument panel which contained the yellow and orange "6" logo and the words "Grand National Buick Motor Division".) The 1982 GN came with a naturally aspirated V6 engine with at 4000 rpm and of torque at 2000 rpm. Of the 215 Grand Nationals produced in 1982, at least 35 were based on the Buick Regal Sport Coupe package with the turbocharged V6 engine with at 4000 rpm and of torque at 2600 rpm. There were only 2022 Sport coupes produced in 1982, and the number of cars with both the GN and Sport coupe packages is estimated to be fewer than 50. For 1983, there was no Grand National. The Sport Coupe model was renamed the T-Type; 3,732 were produced ( at 4000 rpm and of torque at 2400 rpm). The power gains came courtesy of a low-restriction dual exhaust, stainless steel headers (rather than the original cast iron items), and other detail improvements. Drivability was improved thanks to better electronics for the exhaust gas recirculation system as well as the knock sensor. The T-Type trim name had been used on other Buicks, starting with the Riviera in 1981 (in 1979 and 1980, it was the S-Type). Other improvements on the 1983 Regal T-Type included Hydro-Boost II brakes, 200-4R four-speed overdrive transmission replacing the earlier three-speed, and a 3.42 rear axle (7.5"). Inside there were new bucket seats and a sport steering wheel and quicker steering ratio, while the suspension was honed with a larger diameter anti-roll bar, altered spring rates, and re-valved shock absorbers. For 1984, the Grand National returned, now in all black paint. The turbocharged became standard and was refined with sequential fuel injection, distributor-less computer-controlled ignition, and boasted at 4400 rpm and of torque at 2400 rpm. Only 5,204 turbo Regals were produced that year, only 2,000 of which were Grand Nationals. Because this was the first year of production of the computer-controlled sequential fuel injection and distributor-less ignition, this is often considered the year and model that started the development of the legendary intercooled Grand Nationals. The performance of this package was well ahead of its time and the "little V6" easily kept up with the bigger V8s. performance was listed at 15.9 seconds at stock boost levels of , while for the same year, the Chevrolet Camaro V6 was listed at 17.0 and the Chevrolet Corvette