The Porsche 914 outsold the 911 by 17,012 to 11,624 cars in 1974, which is understandable given that the 914 cost about half of all but the lowest-end 911 models that year. American buyers could choose between a 1.8-liter version with 72.5 hp and a 2.0-liter version with 91 horses, and this February 1974 magazine ad takes care to point out (just four months after the start of the 1973 Oil Crisis) that the 914 with the bigger engine still managed to get up to 23 mpg.
This text sure makes the 914 seem practical for post-oil-embargo America.
914 production ended in 1976, with the 2.0-powered 912E smoothing the low-cost Porsche transition between the 914 and the more modern, water-cooled/front-engine 924.
74 Porsche 914 Magazine Ad – All.pdf