Here are numbers are from Mitsubishi Australia's website. I was a little off, but still pretty close.
Anyway, this is with the 1.2L engine in both cars. They don't specify manual or CVT oddly though. Anyway, lets run the numbers. Worst case rating for the Mirage is 4.9l/100km = 48 mpg US. The best case is 4.6l/100km or 51 mpg.
Holden Barina Spark with 1.2L = 5.5l/100km or 42.7 mpg. The Spark is currently only available with a manual trans in Australia.
Worst case: 48 / 42.7 = 1.12
Spark EPA combined = 34 combined
est Mirage EPA combined = 34 * 1.12 = 38 mpg
Best case: 51 / 42.7 = 1.19
est Mirage EPA combined = 34 * 1.19 = 41 mpg
Interestingly, the Australian site doesn't mention the Mirage using start/stop which many articles have claimed it has. This could be a large factor in the actual city mileage. Unfortunately the EPA testing still doesn't test with the car sitting idling to represent any savings there.
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