"Mustang is redesigned for 2005, getting more power, new features, and styling inspired by its 1960s ancestors. Coupe and convertible models are offered. They gain some 6 inches in wheelbase and overall length vs. the 1999-2004 generation. Weights rise about 100 lb on coupes, 275 lb on convertibles. A new underbody structure replaces one dating from 1979, but Mustang retains a solid rear axle rather than adopting independent rear suspension. Both body styles come in base V6 and GT V8 versions, and in Deluxe and Premium trim. The V6 is now a 210-hp 4.0-liter vs. a 193-hp 3.8. GTs reprise a 4.6-liter V8, but with 300 hp vs. 260. A 5-speed manual remains the standard transmission. The optional automatic has five speeds vs. the previous four. All Mustangs have 4-wheel disc brakes. ABS and traction control are standard on GTs, optional on base models. No antiskid system is available. Base versions have 16-inch wheels, GTs 17s. Among options new to Mustang are front side airbags that cover torso and head, and an Interior Upgrade Package that includes instrument lighting with 125 color choices. All Mustangs come with air conditioning and CD player. Coupes have 50/50 split folding rear seatbacks. Convertibles include a power fabric top with heated glass rear window. Leather upholstery is standard on GT Premiums, available for other models. GTs include grille-mounted fog lamps and a rear spoiler."