Dodge Challenger

Year	Total Produced	Engine availability in cubic inches/Horsepower
1970	83,032	198six/125hp, 225/145hp, 318V-8/230hp, 340/275-290hp, 383/290hp, 426/425hp (Can you believe what this Street Hemi could do?), 440/350hp (Are five V-8 engines enough to choose from?)
1971	29,883	198six/125hp, 225/145hp, 318V-8/230hp, 340/275hp, 383/275hp, 426/425hp, 440/370hp
1972	26,658	225six/110nhp, 318V-8/150nhp, 340/240nhp, 360/175nhp, 440/280nhp, 440/330nhp: This 330 *net* horsepower was achieved using *three* Holley two-barrels!
1973	32,596	225six/105nhp, 318V-8/150nhp, 340/240nhp, 360/170nhp,440/280nhp
1974	16,437	225six/105nhp, 318V-8/150nhp, 360/200-245nhp 440/275nhp

Note: Starting in 1972, the "net" horsepower rating system went into effect and meant that the motors were tested with all their equipment attached, which resulted in lower horsepower numbers, making them appear to have less power than they actually had. The auto makers had to start lowering compression ratios in 1971 and this resulted in some horsepower loss, but it wasn't until 1975 that muscle cars were dealt their final blow. Compression was lowered even more to allow cars to run on unleaded fuel. Big block engines became extinct, and the smaller engines were so underpowered it was pathetic.