3rd Oct 2014, 14:32
Everything from that era was slow due to emissions junk. And the 425 was a big block, that is why it got such bad fuel economy. The 368 (V8-6-4) was not bad if you simply hardwired it to run on all 8 cylinders.
Even the Camaro Z28, Trans Ams and Mustangs from the mid 1970s to early 1980s were tepid performers at best.
The only fast car from that era was the 1986 to 1987 Buick Grand National, also known as "the Corvette Killer".
14th Mar 2013, 21:19
I test drove a 79 Deville about 5 years ago. It was in nearly mint condition with only 48,000 miles on it. That 425 wasn't underpowered at all. The torque was incredible. The thing went from 60-85 in the blink of an eye it seemed; and did so without growling or becoming raucous like small blocks do. It was a very graceful and quiet performing car. Not underpowered for the era at all. A late 70's Trans Am has similar power and torque ratings from its Olds 403 V8.