Jeffro's Gaming Blog: Car Wars, Star Fleet Battles, Ogre, Battletech, and more!

Here's a different approach for calculating speed and range mods that's usable with any version of Car Wars played at the 1 inch = 15 feet scale:

 

Take the distance to the target in inches and add it to the speed of the target in inches-per-turn.  Divide the result by three and round down.  Examples:  A car moving at 3 inches per turn (30 mph) at a distance of 2 inches away (30 ft.) will snag a -1 to-hit modifier.  A car moving at 6 inches per turn (60 mph) at a distance of 6 inches away (90 ft.) will get a -4 to-hit modifier.

 

The modifiers are generally pretty close to what Car Wars Compendium 2e gives, but this system will give a much a smoother range of values.