The Mini John Cooper Works line is set to get a little more efficient. Engineers have given the turbocharged 1.6-liter four-cylinder engine a tune-up with new reinforced pistons, a sturdier cylinder head laded with lightweight cams, and sodium-filled exhaust valves. Though the forced-induction four-pot is good for 208 horsepower and 192 pound-feet of torque, an overboost function can step up the power to 207 lb-ft.
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