amazon:
the-missile:
with current regulations regarding global CO2 footprint, tax and etc... this downsizing fashion is just going to continue till they produce tons of EVs.
I've heard the exact opposite recently. And it comes from Porsche apparently. In Europe, the new emissions rules are more and more based on real emissions and Turbo engines are not that efficient at all compared to atmospheric engines. Most of the times, it's actually quite the opposite as consumptions are very high. Those engines are only efficient when you just cruise along and don't use the power. For manufacturers, it proved to be a good solution when emission's tests were made like in the old days. Not so much today (the norme EU7 is coming). It seems Porsche wants to develop a new flat-6, with no turbos and bigger displacement to reduce emissions in the future.
Frank Walliser:
"In 2026, the next wave of regulations will come with EU7. This will be the worldwide toughest regulations considering emissions, especially in the spread between real driving emissions and what we see on the test benches,"
"We will see a big change because it means for everybody, new engines and we will see bigger displacements coming back again."
"I expect 20 percent more displacement on average for these EU7 capable engines. A lot of manufacturers will jump from four to six, from six to eight [cylinders],"
Slapping a turbo on a small displacement engine is basically slapping a emission defeating device to sneak past the 'regulation'. It served no purpose. Since the testing standard are public and known to manufacturers, defeating it is as simple as custom tune on a fuel map delaying the turbo boost for the headline power number.
Government testing methods are just that, a test. No human being drive the way they do the testing. Tests uses a very small throttle input, and manufacturers simply adjust their fuel map and transmission shift points for turbo cars accordingly. Engines don't make much power if at all in this setting, Not even tea people in coffins can tolerate a car accelerating at such a slow rate.
In real world driving, throttle opening will be much bigger, and that's where the crossover point on fuel consumption between a small displacement turbo car and a bigger N/A engine car happens. The turbo-ed engine will need more fuel to develop the power needed while the bigger engine doesn't need as much fuel simply because of the bigger displacement. Fuel is a form of coolant to cool the air fuel mixture in a turbo car, the higher the boost, the more fuel is pumped into the cylinder to cool the charge. Wasted in simple words. N/A engine cars doesn't need that coolant, it burns only the needed amount of fuel to develop the needed power.
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