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The heart of the Solstice GXP is the Ecotec 2.0-liter turbo engine, GM’s first direct injection offering in North America . It produces 260 horsepower and 260 lb.-ft. of torque, making it GM’s highest specific output engine ever, at 2.1 horsepower per cubic inch of displacement (130 hp / 97 kw per liter), and the most powerful production engine in the Ecotec family.

A dual-scroll turbocharger with a lightweight turbine provides nearly instant power, and an air-to-air intercooling system boosts the turbo’s performance by reducing inlet temperatures. Dual cam phasing complements the turbocharging system by optimizing valve timing at lower rpm for best turbo response and quick access to engine torque.

Direct injection technology helps the Ecotec engine produce more power while maintaining the lower fuel consumption of a small displacement port-injected engine. With direct injection, fuel is delivered directly to the combustion chamber to create a more complete burn of the air/fuel mixture. Less fuel is required to produce the equivalent horsepower, especially at normal cruising speeds, of a conventional port-injection combustion system.

The GXP’s high-performance Ecotec turbo engine is connected to a standard five-speed manual gearbox, or an optional five-speed automotive transmission. Either transmission can propel the car from zero-to 60 mph in under 5.5 seconds.