difference between Lexus RX 330, Lexus RX 300, Lexus RX 350, and Lexus RX 400?

The difference between the RX 330, 300, 350, and 400h is engine size. The numbers signify how big the engine is. Take, for example, the 350. Move the decimal to the left two places and that's how big the engine is (3.5 liters). Same as the 330 (3.3 liters) and the 300 (3.0 liters). They try to trick you with the 400h, though. If you see a Lexus with an 'h' after the letters, that isn't the actual size of the engine. The RX 400h isn't a 4.0 liter, but it's comparable to a 4.0 liter. The gasoline engine is 3.5 liters and the electric engine is 0.5 liters that come together to make a total of 4.0 liters. As the years go on, the numbers increase.

From 1999 - 2003, the RX was a 300. Then in 2004, they redesigned the RX and replaced the 3.0 liter engine with a 3.3 liter engine and then called it RX 330. Then Lexus thought that the RX needed more power so they upgraded the engine to a 3.5 liter (RX 350). They also added a hybrid to the line in 2006 and called it the RX 400h.

The safest RX out there is the newest RX. Generally cars get more and more safe as they get older. The RX 300 is safe, but the RX 330, 350, and 400h have more safety features in them.

The newest RX is the RX 350 and 400h.