Modern spark and fuel control. Tighter tolerances inside the engine.
Each cylinder is sealed better than they used to be. So we are getting more out of the charge. A long with more advanced timing control of the cams along with spark.
The turbocharger becoming ubiquitous is just a bonus.
Modern spark and fuel control. Tighter tolerances inside the engine.
Each cylinder is sealed better than they used to be. So we are getting more out of the charge. A long with more advanced timing control of the cams along with spark.
The turbocharger becoming ubiquitous is just a bonus.