You cant really tell when it starts up. It has no conventional starter, i think it uses the electric torque converter to crank the engine. The prosses is really quick even with the radio off you can't tell till you look at the tach the engine starts and turns off. Like I said you dont even have to accelarate to turn the engine on, as soon as you let off the brake the engine comes on before you can even hit the gas pedal. We also have had the Toyota hybrids for a while, they are more noticible because you can accelerate with the gas engine off on electric power. Maybe enough of these things get on the road and we wont have to depend on foriegn oil. Iran and Iraq can go back trying to sell beach sand.