Lexus redesigned its five-seat RX crossover for 2010, with the gasoline RX 350 carrying over a similar V-6 drivetrain. Because its electrically assisted V-6 grew to 3.5 liters from 3.3 liters, the RX 400h became the Lexus RX 450h. Front-wheel drive is standard, with all-wheel drive optional.Like Lexus' other hybrids, the RX 450h's display screen can show the power flow between the drivetrain's