Mario Kart Wii Vehicle Chart

The following is an extensive chart containing every vehicle in Mario Kart Wii, ranked in all seven categories from 1 to 36 by their statistical values. Red Highlights are Small Vehicles (Red for Karts, Pink for Bikes), Blue Highlights are Middle Vehicles (Blue for Karts, Light Blue for Bikes), and Green Highlights are Large Vehicles (Green for Karts, Light Green for Bikes). Click to enlarge (suggested):

Superlatives:

With added Driver Bonuses we can compile the best stats in the game:

Speed: 
Large/Overall: Funky Kong in the Jetsetter (73)
Middle: Daisy in the Sprinter (68)
Small: Baby Luigi or Baby Daisy in the Blue Falcon (65)

Acceleration:
Small/Overall:Toad in the Quacker (73)
Middle: Peach in the Classic Dragster (64)
Large: Waluigi in the Wario Bike (57)

Handling:
Small/Overall: Baby Mario in the Nanobike (73)
Middle: (tie) Mario or Daisy in the Sugarscoot (64)
Large: King Boo in the Wario Bike (61)

Drift:
Small/Overall: Toad in the Bullet Bike (73)
Middle: Peach in the Mach Bike (67)
Large: Waluigi in the Shooting Star (64)

Mini-Turbo:
Small/Overall: (tie) Koopa or Dry Bones in the Bullet Bike (73)
Middle: (tie) Birdo or Diddy Kong in the Mach Bike (67)
Large: (tie) Wario or Dry Bowser in the Shooting Star (65)

Weight:
Large/Overall: Bowser in the Piranha Prowler (72)
Middle: (tie) Mario or Luigi in the Wild Wing (57)
Small: (tie) Baby Mario or Baby Luigi in the Tiny Titan (43)

Offroad:
Small/Overall: Toadette in the Magikruiser (73)
Middle: Yoshi in the Zip Zip (68)
Large: Dry Bowser in the Phantom (62)

From a glance you can see that there are Vehicles to fit any playing style and there are also Karts that do not act like their normal weight class, such as the Blue Falcon, the Wario Bike, the Sprinter or Daytripper. Mix and match and find the best option.