13. Ford 428 Cobra Jet and Boss 429
Back in the height of the muscle car wars, Ford had two powerful weapons. One was the mighty 428 Cobra Jet and the other was a rare and expensive Boss 429 semi-Hemi engine. Both of those units were true muscle car engines. They had big 7.0-liter V8s with loads of torque and horsepower. However, when Ford decided to rate them at 335 HP, people considered it a joke. In fact, multiple Ford muscle engines like the 427, 429 and even the Lincoln 460 V8 had a rating of 335 HP.
With this HP number, Ford was comfortable with the insurance rates for their customers. Looking at the specifications chart revealed the truth. Despite the fact that all those units produced 335 HP, their torque figures were different, revealing what hid behind the factory ratings. Today, drivers know the famous 428 Cobra Jet from the 1969 Mustang Mach I delivers close to 420 HP, and the crazy Boss 429 semi-Hemi engine makes around 550 HP thanks to its 6,000 rpm redline.