What liter is the 91 CID?

The 91 CID (cubic inch) engine displacement is approximately 1.5 liters. To convert cubic inches to liters, you can use the conversion factor where 1 cubic inch is equal to 0.0163871 liters. Therefore, 91 CID multiplied by this factor gives you roughly 1.49 liters, which is commonly rounded to 1.5 liters.