Boasts 29 Highway MPG and 22 City MPG! This Buick Envision boasts a Turbocharged Gas I4 2.0L/ engine powering this Automatic transmission. ENGINE, 2.0L TURBO, 4-CYLINDER, SIDI (228 hp [170 kW] at 5000 rpm, 258 lb-ft of torque [350 N-m] at 1500-4000 r...