This led manufacturers to design special track-focused road cars they could enter in NASCAR, with the hope of getting the jump on their rivals. Buick did ... Its 3.8-liter V6 powerplant was ...
Three years later in 1981, the Buick Century Regal — now called just the Regal — entered NASCAR with the Junior ... the installation of a new turbo V6 engine and an intercooler that ...
They introduced the Grand National trim for the Regal, celebrating their NASCAR Grand National ... with a turbocharged 3.8-liter V6 engine and all-black paint. Buick wasn’t done yet.