Fuel Economy / MPG » 7
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GREEN | 7 out of 10
128i: 18/28 mpg (manual & automatic); 128i convertible: 18/28 mpg (manual), 18/27 mpg (automatic)
135i: 20/28 mpg (manual), 18/25 mpg (dual-clutch); 135i convertible: 18/28 mpg (manual), 18/27 mpg (automatic)
The 2013 BMW 1-Series are relatively fuel-efficient if you're comparing them to other sports cars, but next to other sport coupes or compact sport sedans, they're falling toward the back of the pack.
That's mostly because in recent years a number of other models--even BMW's larger 3-Series--have gone to smaller engines and base turbo fours. Although a new 2-Series model next year is expected to make that change, the standard 128i coupe rates 18/28 mpg city/highway with either the manual or the automatic transmissions, which is well below the 3-Series' ratings.
The turbocharged 135i scores slightly better, perhaps surprisingly considering its greater power output, rating 20/28 mpg with the manual transmission, though it suffers slightly with the seven-speed dual-clutch, rating 18/25 mpg according to the EPA.
The BMW 1-Series is falling further back, as luxury vehicles get downsized engines and higher mileage.