The 2010 Lexus RX 450h is stable around town and the double-wishbone suspension soaks up most road imperfections. There's not a lot of excitement in driving the RX 450h, but that may be just the kind of thing Lexus buyers expect and appreciate. What those buyers will likely not appreciate is the necessary commotion that accompanies a gas-electric hybrid powertrain.
When the RX comes to a stop, it's obvious that more than simple braking is going on — the brakes can be grabby and then there's a noticeable electric whine as the vehicle comes to a full stop. It's all part of the regenerative braking system that adds extra juice to the battery pack whenever the car is coasting or braking.
The hybrid version of the RX isn't especially quick either, with a 0-60-mph run of 7.2 seconds. This is noticeably slower than last year's RX 400h, despite the RX 450h's 27 more horsepower (295 hp). In everyday driving, the RX feels adequate in terms of acceleration, but if you need an extra dose of speed, you really have to prod the accelerator.