The current generation Lincoln Town Car arrived in 1990 with the iron-block, overhead valve 5.0-liter V8 that has powered Ford products for decades. But the Lincoln flagship quickly switched to an all-new OHC, 32-valve, 4.6-liter V8, the first overhead-cam V8 to be mass-produced by a domestic automaker. The new engine, mated with a 4-speed automatic overdrive transmission produces 190 horsepower at 4200 rpm and 260 pound-feet of torque at 3200 rpm. The optional dual exhaust system improved output to 210 horsepower at 4600 rpm and 270 pound-feet of torque at 3400 rpm. By 1994, the dual exhaust system is standard on all Town Car models. A new air-intake system for 1996 helps improve engine torque slightly, to 275 pound-feet at 3400 rpm. As a cost-saving measure the dual exhausts are dropped for the Executive and Signature Series in 1997, which lowers the horsepower back to 190, while torque scales back to 265 pound-feet.