12. 6.1-Liter Hemi V8
The modern Hemi engine provides a great basis for further development, so it was not long before Chrysler introduced the next version. It came with upgraded displacement, power and torque. In 2005, in the SRT models of Chrysler, Dodge and Jeep, the new Hemi performance version appeared.
It was a 6.1-liter Hemi with different blocks and heads to allow better cooling and flow. The power output was hefty at 425 HP. That was a new milestone for naturally aspirated engines. Also, this was an interesting historical moment since the new Hemi matched the output of the old 426 Hemi engine, or at least the advertised output.