One is the switch to four valves per cylinder from the traditional two.

All four valves per cylinder were engaged above 6,800 rpm.

Both have 1.6-liter engines that use four valves per cylinder.

There will then be 3n control areas per cylinder on the 3350 and no loss of performance will result from the transfer.

The original Chrysler design of two large valves per cylinder is used.

This was a technically advanced design at a time where most cars used only two valves per cylinder.

It was a single overhead cam design with 2 valves per cylinder.

It was based upon the K100 engine, but now with four valves per cylinder.

By contrast, the 6.0L only has 4 head bolts per cylinder.

One thing that a hemispherical head will never have is four valves per cylinder.