Displacement - 5.7 Liters - 348 CID
Bore - 99.5 mm - 3.92 in.
Stroke - 90.9 mm - 3.58 in.

It just clicked. Dodge rounds the liters to 5.7, though it is slightly less. When converting from liters to cubic inches it comes out to 347.xxx, then gets rounded to 348.

 

Why are cubic inches important? Surely the power, torque, fuel economy and longevity are the true issues?

A Formula 1 engine can develop 750hp from a 2.4l V8. They last only a couple of races and drink special fuel.

Our "other" Hemi is a year older and develops 355hp vs my 390. No cubic increase necessary. Why the 6.1?

 

The 5.7 Hemi in the Ram is a decent engine, producing 68.4 HP per liter.

The 6.1 Hemi in the SRT-8 cars is better, producing 69.6 HP per liter.

But for that matter, the 1 liter motor in my sport bike makes 147 HP per liter (over double what our trucks make). And there are numerous Yamaha FZ-1 motorcycles that have turned over 100,000 miles, while getting 48 mpg on the highway, with pump gas. Can't really compare motorcycles to trucks though.

MOPWR2U

 

I guess my point was that at 5.7l, with variations in my family of 355 and 390 hp, it really DOES NOT need to be bigger to produce more power & torque, let alone any fuel efficiency issues. More cubic capacity is more of a marketing thing to me at that size of engine.

 

All I have read is 348 CID......and yet a 5.7 L chevy is a 350 CID

 

But imagine a big block with the same engineering/special fuel...
the no replacement for displacement rule still stands