The roaring revival of the V8 engine

US automakers are bringing back their gas-churning V8 engines as federal regulators relax climate rules.

Brandon Bell/Getty Images

• Car companies have been re-launching powerful V8 engines that were previously discontinued.
• Many high-powered trucks were removed from the US market as car companies switched to more fuel-efficient models.
• American automakers have led the charge on the V8 reboot.

The growl of a V8 engine — a deep, throaty roar that swells when a driver stomps the gas pedal ...