Here's how those two concepts interact:
* VTEC engines can be ULEV-compliant: Honda has produced many VTEC engines that meet ULEV emissions standards. This means they are clean-burning engines, but it doesn't inherently mean they are more powerful.
* VTEC technology enhances power: VTEC engines are designed to provide more power and efficiency by adjusting valve timing and lift. This is often accomplished by switching between two camshaft profiles – a low-rpm profile for fuel efficiency and a high-rpm profile for power.
So, does a ULEV VTEC engine have more power than a regular engine?
* It depends on the specific engines being compared. A VTEC engine with the ULEV designation may be more powerful than a non-VTEC engine that isn't designed for high performance. However, it's possible for a non-VTEC engine to be more powerful than a VTEC engine with the ULEV designation if the non-VTEC engine is designed for performance.
To answer your question accurately, you need to provide specific engine models for comparison. For example, comparing a Honda Civic with a ULEV VTEC engine to a Honda Civic with a non-VTEC engine.
In general, however, VTEC engines are known for their ability to produce more power than non-VTEC engines, especially at higher RPMs. However, ULEV certification primarily focuses on reducing emissions, not necessarily maximizing power.