The heart of the IS 350 is a potent 3.5-liter V6 that churns out 306 horsepower [1], making it the most powerful engine in its class [2]. With 277 lb-ft of torque at 4,800 rpm, the IS 350 can achieve an astounding 0-60 acceleration time of 5.3 seconds [3], which is fastest in its class [3]. The IS 250 is briskly propelled by a 2.5-liter 204-hp V6 [1] with 185 lb-ft of torque