How small is too small for an engine?

[ksa8907]

I'll make one last post on the matter.

I know my claim is bold, but my point is in regards to production vehicles. The engine is selected then the gearing is selected to achieve whatever metric is most important.

Example below, very similar vehicles with different engine sizes getting nearly identical fe. Unless yall are theorizing or daydreaming about building a custom car, I stand by my claim: engine size is NEARLY irrelevant for real world fe.

Example:
2020 models, 4dr non-hybrid, naturally aspirated
Honda civic 4dr, 2.0 cvt, 30/33/38
Nissan versa, 1.6 cvt, 32/35/40
Toyota camry, 2.5 8spd, 29/34/41

[Isaac Zachary]

Originally Posted by ksa8907

I'll make one last post on the matter.

I know my claim is bold, but my point is in regards to production vehicles. The engine is selected then the gearing is selected to achieve whatever metric is most important.

Example below, very similar vehicles with different engine sizes getting nearly identical fe. Unless yall are theorizing or daydreaming about building a custom car, I stand by my claim: engine size is NEARLY irrelevant for real world fe.

Example:
2020 models, 4dr non-hybrid, naturally aspirated
Honda civic 4dr, 2.0 cvt, 30/33/38
Nissan versa, 1.6 cvt, 32/35/40
Toyota camry, 2.5 8spd, 29/34/41

That does illustrate the main point I was making in the beginning: that the common claim that smaller engines are underpowered and therefore less efficient is not true, or "NEARLY irrelevant".

Interestingly your numbers there do show a possible correlation between bigger engines being less efficient in city driving.

[cRiPpLe_rOoStEr]

Originally Posted by Isaac Zachary

Interestingly your numbers there do show a possible correlation between bigger engines being less efficient in city driving.

Idle shut-off fitted to so many new vehicles might level the field in city driving at least a little