Couldnt help it but noticing the size of the 3series now is actually the e39 5series.
E39 5series / F30 3series
Wheelbase 2,830 mm (111.4 in) / 2,810 mm (110.6 in)
Length 4,775 mm (188.0 in) / 4,636 mm (182.5 in)
Width 1,801 mm (70.9 in) / 1,811 mm (71.3 in)
Height 1,435 mm (56.5 in) / 1,429 mm (56.3 in)
1,415 mm (55.7 in) (2000-03 540i saloon)
1,440 mm (56.7 in) (1997-99 estate)
1,417 mm (55.8 in) (1997-99 540i saloon)
1,486 mm (58.5 in) (2000-03 estate)
(source
http://en.wikipedia.org/wiki/BMW_5_Series_(E39))