The 2005+ base Mustang is powered by Ford's cast iron block 4.0 L Cologne SOHC V6, replacing the 3.8 L Essex OHV V6 used in 2004 and older models. It produces 210 hp at 5300 rpm and 240 lb·ft of torque at 3500 rpm and is mated to a standard Tremec T-5 5-speed manual transmission with Ford's 5R55S 5-speed automatic transmission available as an option. A 3.31:1 final drive ratio is standard with either transmission. Though criticized for a lack of refinement, the standard V6 powertrain is capable of delivering competitive performance. In a comparison test with a Pontiac G6 Convertible conducted by Motor Trend magazine, a Mustang V6 Convertible equipped with an automatic transmission was able to accelerate from zero to 60 miles per hour in 7.3 seconds; 1.4 seconds better than its competitor.