2015 Toyota Tundra is equipped with one of two V-8 engines: a 4.6-liter producing 310 hp and 327 lb-ft of torque or a 5.7-liter making 381 hp and 401 lb-ft. Both come paired to a six-speed automatic transmission. Performance is good with the 5.7-liter providing the best acceleration. TRD Pro Series models with their retuned suspension are the most capable off-roaders in the lineup and donâ€™t sacrifice ride quality on the pavement. Additionally, models equipped with the 5.7-liter V-8 have a generous 9,800-pound towing capacity, making it a viable work truck.