| Make | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Make | # | Date | Links | Pictures | Forums | History |
| Packard (United States of America) | 61 | 1899 - 1958 | --> 61 |
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| Pagani (Italy) | 8 | 1999 - | --> 18 |
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| Paige (United States of America) | 1 | 1908 - 1927 | --> 4 |
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| Panhard et Levassor (France) | 28 | 1889 - 1967 | --> 5 | --> 34 |
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| Panoz (United States of America) | 4 | 1996 - | --> 15 |
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| Panther (United States of America) | 16 | 1970 - 1985 | --> 12 |
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| Pars Khodro (Iran) | 5 | 1960 - | --> 4 | 2 msg |
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| Paykan (Iran) | 1966 - | --> 2 |
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| Peerless (United States of America) | 1 | 1900 - 1931 | --> 6 |
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| Pegaso (Spain) | 4 | 1951 - 1957 | --> 7 |
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| Pennington (United States of America) | 1 | 1894 - 1902 | --> 4 |
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| Penske (United States of America) | 2 | - | --> 3 |
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| Perodua (Malaisia) | 14 | 1994 - | --> 19 |
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| Peugeot (China) | 1990 - | |||||
| Peugeot (China) | 2 | - | --> 2 | 114 msg | ||
| Peugeot (Argentina) | 2 | - | --> 3 |
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| Peugeot (France) | 616 | 1889 - | --> 79 | --> 637 | 418 msg |
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| PGO (France) | 2 | 1998 - | --> 6 | 2 msg | ||
| Philos (France) | 1 | 1912 - 1923 | --> 3 |
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| Pierce Arrow (United States of America) | 13 | 1901 - 1938 | --> 17 |
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| Pilain (France) | 1 | 1902 - 1920 | --> 3 |
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| Pilot (Germany) | 1 | 1923 - 1925 | --> 3 |
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| Pininfarina (Italy) | 2 | 1932 - | --> 21 |
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| Piper (United Kingdom) | 1967 - 1974 | --> 2 |
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| Plymouth (United States of America) | 516 | 1928 - 2000 | --> 160 | 3 msg |
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| Polski Fiat (Poland) | 1972 - 2000 | |||||
| Pontiac (United States of America) | 812 | 1926 - | --> 31 | --> 316 | 12 msg |
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| Pope-Hartford (United States of America) | 1 | 1903 - 1914 | --> 2 |
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| Pope-Toledo (United States of America) | 1 | 1903 - 1909 | --> 3 |
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| Popp (Switzerland) | 1 | 1898 - 1898 | --> 3 |
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| Porsche (Germany) | 239 | 1948 - | --> 74 | --> 294 | 134 msg |
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| Praga (Czech Republic) | 3 | 1907 - 1947 | --> 4 | |||
| Premier (India) | 3 | 1944 - 2000 | --> 6 |
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| Prince (Japan) | 15 | 1952 - 1968 | --> 11 |
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| Prinetti & Stucchi (Italy) | 1 | 1898 - 1902 | --> 4 |
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| Prosper-Lambert (France) | 1901 - 1906 |
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| Prost (France) | 1 | 1997 - 2002 | --> 3 | |||
| Proton (Malaisia) | 38 | 1985 - | --> 38 |
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| Protos (Germany) | 1 | 1900 - 1926 | --> 3 |
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| PSA (Malaisia) | - | |||||
| PSA Group (France) | 1976 - | --> 3 |
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| Pullman (United States of America) | 2 | 1903 - 1917 | --> 4 |
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| Puma (Brasil) | 11 | 1964 - | --> 20 |
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| Pyeonghwa (North Korea) | 1 | 2000 - | ||||