5 ways modern car engines differ from older engines

            

In an old V-8 engine, all eight cylinders were firing, no matter if the car was idling or accelerating. They all got the same amount of fuel, regardless.

Today’s engines have technology that makes them work smarter. Cylinder deactivation allows some cylinders in an engine shut down when they’re not needed and `wake up’ when more power is needed. This means the engine only uses the fuel it needs and puts in effort required for the job at hand.

Variable-valve timing and lift is another technology that helps modern engines work smarter. In older systems, valves open for the same amount of time and the same distance no matter how hard the engine is working. That wastes fuel. With variable-valve timing and lift, the valve openings are optimised for the type of work the engine is doing. That helps the engine use less fuel, and work smarter.