Generally the amount of space in the car... i.e. can you fit in comfortably?
The 2013 Dodge Dart has 42.2 in. of front leg room.
The 2007 Kia Optima has 43.7 in. of front leg room.
The 2012 Toyota Sequoia has 42.5 in. of front leg room.
The 2009 BMW X6 has 35.9 in. of rear leg room.
The 2002 BMW M5 has 34.2 in. of rear leg room.
The 2001 Ford Taurus has 42.2 in. of front leg room.
The 2013 Infiniti QX has 39.6 in. of front leg room.
The 2008 Toyota Avalon has 40.9 in. of rear leg room.
The 2015 Chevrolet Suburban has 45.3 in. of front leg room.
The 2008 Hyundai Accent has 42.8 in. of front leg room.
The 2012 Audi A5 has 31.7 in. of rear leg room.
The 2012 Audi A5 has 41.3 in. of front leg room.