Unless something changes. Smaller engines are the future for the USA driving public. And they want power. To have small engines AND power, you are looking at power adders.
Look at the progression of engines from the 1920s to today. The Model T had 177 cubic inches. Engines continually grew until peak in the late '60s/early '70s to deliver more for our ever growing power hunger. In the mid '70s...oil embargo. Engine sizes and performance cratered. It was the mid/late '80's before performance started to return. It returned in smaller engine sizes that provide power equal to or greater than many "big" engines from the '60s-'70s. Since then power keeps going up along with efficiency, while engine size keeps going down. This trend is not likely to change much. But physics will dictate the bottom of the line for a given power.
Personally I think (over the next 15-20 years) we will see engines end up in the 2-3L range with turbos delivering 250-450 hp. There will special outliers. Electrics will solve their issues and they will become the common norm. It's where things appear to be headed. It could change, but I don't think it will.
Emissions and fuel efficiency demands are and will continue to drive this trend.
Look at the progression of engines from the 1920s to today. The Model T had 177 cubic inches. Engines continually grew until peak in the late '60s/early '70s to deliver more for our ever growing power hunger. In the mid '70s...oil embargo. Engine sizes and performance cratered. It was the mid/late '80's before performance started to return. It returned in smaller engine sizes that provide power equal to or greater than many "big" engines from the '60s-'70s. Since then power keeps going up along with efficiency, while engine size keeps going down. This trend is not likely to change much. But physics will dictate the bottom of the line for a given power.
Personally I think (over the next 15-20 years) we will see engines end up in the 2-3L range with turbos delivering 250-450 hp. There will special outliers. Electrics will solve their issues and they will become the common norm. It's where things appear to be headed. It could change, but I don't think it will.
Emissions and fuel efficiency demands are and will continue to drive this trend.