Most Fuel Efficient Cars 2025. Most modern vehicles are far more efficient than cars in years past, but some models outperform others. Lct threshold for most vehicles increases to $80,567 from 1 july 2024 (up from $76,950).

Regulations on fuel economy and co2 emissions are forcing carmakers to make engines more efficient. Most modern vehicles are far more efficient than cars in years past, but some models outperform others.