Yeah Ferrari have a bit of a history with doing that with there car numbering, it does initially look a bit of a mess but I like the way they number their cars to denote a change/last in engine spec.
1994 – 412T1 – 3.5 v12
1995 – 412T2 – 3.0 V12 – Downgraded spec of the above
1996 – F310 – 3.0 V10
1997 – F310B – 3.0 V10
1998 – F300 – 3.0 V10
1999 – F399 – 3.0 V10
2000 – F1 2000 – 3.0 V10
2001 – F2001 – 3.0 V10
2002 – F2001 – 3.0 V10
and so on
2006 – 248-F1 – 2.4 V8
2007 – F2007 – 2.4 V8
and so on
etc.