I updated the stats again, and here is the new lists...
Most vehicles:
Count Title
314 CHiPs (1977) (series)
229 The New Avengers (1976) (series)
164 Miami Vice (1984) (series)
131 Alarm für Cobra 11 - Die Autobahnpolizei (1996) (series)
128 Clarkson's Top 100 Cars (2001) (TV)
120 The Dukes of Hazzard (1979) (series)
109 The Persuaders! (1971) (series)
106 The X Files (1993) (series)
101 The Junkman (1982)
101 Danger Man (1960) (series)
101 The Champions (1968) (series)
96 Alias (2001) (series)
96 Gone in 60 Seconds (1974)
92 Chris Barrie's Motoring Wheel Nuts (1995)
80 Gone in Sixty Seconds (2000)
77 Sous le soleil (1996) (series)
74 Le petit soldat (1963)
74 Mitt hjärtas Malmö (2005) (doc.)
73 The Fast and the Furious (1954)
72 Fastlane (2002) (series)
70 24 (2001) (series)
69 Du rififi à Paname (1966)
64 Un homme est mort (1972)
60 Ronin (1998)
60 In The Red (1999)
Same with only movies and TV-movies:
Count Title
128 Clarkson's Top 100 Cars (2001)
101 The Junkman (1982)
96 Gone in 60 Seconds (1974)
92 Chris Barrie's Motoring Wheel Nuts (1995)
80 Gone in Sixty Seconds (2000)
74 Le petit soldat (1963)
73 The Fast and the Furious (1954)
69 Du rififi à Paname (1966)
64 Un homme est mort (1972)
60 In The Red (1999)
60 Ronin (1998)
58 Grand Theft Auto (1977)
53 Invisible Man (1958)
53 La Polizia La Legge Assolve (1973)
52 Vertigo (1958)
51 Le deuxième souffle (1966)
50 Maximum Overdrive (1986)
48 The love bug (1968)
48 The Gumball Rally (1976)
47 The Girl on a Motorcycle (1968)
46 Under Suspicion (1991)
46 Car-Napping - Bestellt, geklaut, geliefert (1980)
Counting only vehicles with more than 1 star:
Count Title
147 CHiPs (1977) (series)
103 Miami Vice (1984) (series)
93 The New Avengers (1976) (series)
76 Alarm für Cobra 11 - Die Autobahnpolizei (1996) (series)
67 Clarkson's Top 100 Cars (2001) (TV)
62 The X Files (1993) (series)
60 Sous le soleil (1996) (series)
58 The Junkman (1982)
55 Chris Barrie's Motoring Wheel Nuts (1995)
55 The Dukes of Hazzard (1979) (series)
51 Alias (2001) (series)
50 The Persuaders! (1971) (series)
49 Danger Man (1960) (series)
44 Gone in 60 Seconds (1974)
44 Gone in Sixty Seconds (2000)
43 The Fast and the Furious (1954)
39 24 (2001) (series)
37 Stargate SG-1 (1997) (series)
36 Michel Vaillant (2003)
35 Vremya zhestokikh (2004) (series)
33 The Champions (1968) (series)
32 Grand Theft Auto (1977)
32 Cannonball Run II (1984)
31 Trafic (1971)
Same with only movies and TV-movies:
Count Title
67 Clarkson's Top 100 Cars (2001)
58 The Junkman (1982)
55 Chris Barrie's Motoring Wheel Nuts (1995)
44 Gone in 60 Seconds (1974)
44 Gone in Sixty Seconds (2000)
43 The Fast and the Furious (1954)
36 Michel Vaillant (2003)
32 Cannonball Run II (1984)
32 Grand Theft Auto (1977)
31 Trafic (1971)
29 The Gumball Rally (1976)
28 James Bond - The Living Daylights (1987)
28 Convoy (1978)
28 Autobahnraser (2004)
28 Invisible Man (1958)
27 The Cannonball Run (1981)
26 Les anges gardiens (1995)
25 Car-Napping - Bestellt, geklaut, geliefert (1980)
25 xXx (2002)
25 Maximum Overdrive (1986)
24 The Fast and the Furious (2001)
24 Ronin (1998)
24 The Italian Job (1969)
23 RPM (1998)
So some of the car-id do not exist anymore, but they won't be reused.
+ Volvo is almost in top 10 (#11) 