Under the Karma Revero GT hood lies a GM-sourced 2.0-liter turbocharged four-cylinder engine (a repurposed Pontiac Solstice GXP unit) that produces a maximum 235 horsepower and 258 lb-ft of torque. The exhaust pipes dump out just behind the front wheels. The Karma Revero GT battery pack runs down the centerline of the car in what …