1. Specific Engine Variations:
* 426 Hemi: There were different versions of the 426 Hemi (Street Hemi, Race Hemi) with varying power outputs. The iconic 426 Hemi was primarily a race engine, while the street version, though powerful, was more tamed for everyday driving.
* 440: The 440 also had numerous variations, including the 440 Six Pack (390 hp), 440 Magnum (375 hp), and others.
2. Modifications: Both engines can be modified to increase their power and performance. A heavily modified 440 could potentially be faster than a stock 426 Hemi.
3. Application: How the engine is used significantly affects its performance. The power delivery, gearing, and vehicle weight all contribute to overall speed.
4. Time Period: The "fastest" engine might vary depending on what era you're considering. Early versions of the 440 were less powerful than later models.
In general:
* 426 Hemi: The 426 Hemi is known for its incredible horsepower and torque, particularly in its race versions. It revs quickly and has a very aggressive power band.
* 440: The 440 is known for its high torque and strong low-end power. While not as high-revving as the Hemi, it produces good power throughout the RPM range.
To summarize:
* For pure power and acceleration: The 426 Hemi (especially race versions) tends to be the clear winner.
* For overall power and drivability: The 440 with its high torque can be a more usable engine in everyday driving situations.
Ultimately, the best engine depends on your specific needs and what you want to achieve.
