Motor Trend 1974 Car Road Tests
The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models).
Fuel efficiency in miles/gallon
Number of cylinders
Displacement (cu. in.)
Rear axle ratio
Weight (1,000 lbs)
1/4 mile time
Engine type (0 = V-shaped, 1 = straight)
Transmission type (0 = automatic, 1 = manual)
Number of forward gears
Number of carburetors
Henderson and Velleman (1981) comment in a footnote to Table 1: “Hocking [original transcriber]’s noncrucial coding of the Mazda’s rotary engine as a straight six-cylinder engine and the Porsche’s flat engine as a V engine, as well as the inclusion of the diesel Mercedes 240D, have been retained to enable direct comparisons to be made with previous analyses.”
Henderson and Velleman (1981). Building multiple regression models interactively. Biometrics, 37, 391–411.
# TODO: Port this example from R