For those still on the American system - 1 liter = about 61 cubic inches
So a 4.6L will be about 281 CID, a 5.4L will be about 330 CID, a 4.2L will be about 256 CID -- +/- about 3 CID due to rounding.
There is likely an engine code in the VIN - don't know the deciphering scheme offhand.
1989 F150 XLT standard-cab shortbed 4x4, 5.0L, AOD, 3.55 gears, manual hubs, 31x10.50 tires, 218K miles. Repainted Oct09. SOLD - Jan2015
2014 F150 XLT standard-cab shortbed 4x4, 5.0L, 6-speed auto, 3.55 gears, auto hubs, locking diff, trailer pkg, 5K miles.