What is the difference between a Lexus IS & an ISF? ?

[Ken]

Is the ISF the sports model alternative?

 

[bluecow]

the other has a super duper 'F'ast mode

 

[bluecow]

the other has a super duper 'F'ast mode

 

[James]

yes, it is.

IS-F = 8-Speed Auto (0.1 ms shifting), 5.0l engine pumping out 416hp

IS250 = 6-Speed Auto/Manual, 2.5l engine pumping out 205hp

IS350 = 6-Speed Auto, 3.5l engine pumping out 306hp

The IS-F is to the IS as the M3 is to the 3 Series