| Chassis | Engine | Year | Group | First owner - Next owners (year) | Comment |
|---|---|---|---|---|---|
| JM16/097/GTP | Mazda | 1983 | GTP | Jim Downing | |
| JM16/098/GTP | Mazda | 1984 | GTP | Jim Downing/Marsh | |
| JM16/099/GTP | DFV | 1984 | GTP | Courtney | |
| JM16/100/GTP | DFV | 1984 | GTP | St. James | |
| JM16/101/GTP | Buick | 1984 | GTP | Don Bell | |
| JM16/102/GTP | Buick | 1984 | GTP | Charles Morgan | During 1985 IMSA season was raced variously as Argo JM16 and Royale RP39 or RP40. |
| JM16/103/GTP | DFV | 1984 | GTP | Argo Cars Ltd. =PC Automotive (Richard Piper-1986) | Later acquired by Hugh Kleinpeter and re-numbered as Royale RP40.001 . Then sold to Richard Piper and fitted with Mitsubishi engine before reverting to DFL. |
| JM16/104/GTP | Mazda | 1985 | GTP | Corazzo | |
| JM19/106/GTP | Mazda | 1985 | GTP | Fowells | |
| JM19/107/GTP | Mazda | 1985 | GTP | Jim Downing ... => Ralph Thomas | The car won 3 IMSA Lights championships in 1985-87 driven by Downing/Maffuci. This car was the basis for the Kudzu chassis later built by Jim Downing. Later raced by Ralph Thomas in HSR Thundersport series. Winner of Camel Lights class in 1997 and 1999 while winning in 1999 overall. |
| JM19/108/GTP | Mazda | 1985 | GTP | Marsh | |
| JM19/109/GTP | Mazda | 1985 | GTP | Frank Rubino => Jim Downing ... => Dennis Spencer | Won Lights class at 24H Daytona in 1987. It was purchased by Downing as a team car to JM19-107 and campaigned in the Panasonic colors of Hiro Matsushita. It is now (2000) campaigned in the HSR International Thundersport Cup Series in the U.S. by Spencer. |
| JM19/110/C2 | Zakspeed | 1986 | C2 | Schanche - Dahm Racing (1987) | From 1987 Porsche engine. |
| JM19/113/GTP | Buick | 1986 | GTP | O'Neill | |
| JM19B/116/C2 | Zakspeed | 1987 | C2 | Schanche | |
| JM19B/117/C2 | DFV | 1987 | C2 | Hans Egenter => Ruedi Jauslin (1989) => ?, Japan or USA (1998) | |
| JM19B/118/GTP | Ferrari | 1987 | GTP | J. Braun | |
| JM19B/120/C2 | Motori-Moderni | 1987 | C2 | Jean-Pierre Frey => Josef Sacher(Dollop Racing) | Wittwer put Judd engine in it when raced by Sacher. |
| JM19C/121/C2 | DFV | 1988 | C2 | Schanche | |
| JM19C/122/C2 | DFV | 1988 | C2 | Piper (PC Automotive)... => Mike Wright (owner in 2000) | Entry in 1988 WSC bought by Cooke from Mark Wright in 2001 to be raced in Group C-GTP series |
| JM19C/124/C2 | DFV | 1988 | C2 | Messauodi (MT Sport)= France Prototeam (1989) = Dieter Bergermann (1989) = Michael Schuster (1997) | Modified by Bergermann in 1991 and then entered as BGN-Argo
Judd. Erhard Motorsports Austria Sold the car in USA Colorado . The Cosworth replaced with a carbureted Chevrolet V-8 - restored. |
| JM19C/125/C2 | Chevrolet | 1988 | C2 | N. Burke | |
| JM19C/127/C2 | Chevrolet | 1989 | C2 | Hans Egenter => Robert Dubler (1997) | In 2000 still owned by Robert Dubler. |
| JM19D/128/C2 | Chevrolet | 1989 | C2 | Walter Friedrich => Josef Binder (1996 or earlier) => Nick Randall, USA (1999) | Raced in Interserie and Euroserie by Binder. Still owned by Randall in 2000. |
| JM19D/129/C2 | DFV | 1989 | C2 | Helmut Bross | |
| JM19D/130/C2 | DFV | 1990 | C2 | Wittwer | Used as works entry at Le Mans 24 Hours 1990. |
| JM20/131/C | DFV | 1990 | C1 | Wittwer | |
| JM20/132/C | Chevrolet | 1991 | C1 | Helmut Bross => Bruno Baur, CH (~1996) | |
| JM16--- | Built in the Argo works but without being numbered acquired by Hugh Kleinpeter to U.S. It was raced as Royale RP40-002 | ||||
| JM20/WSC001 | Chevrolet | WSC | => Team Cascandia (1998) | Ordered by Stan Wattles as GTP car but wasn't completed. It was shipped over in pieces to be completed by Mike Collucci (MCR). The car was never completed as a GTP car, and was instead modified to be a WSC car and numbered WSC001. Raced by Blake Pridgen/Jeff Jones in 1996/97 then by Ed Zabinski/Shane Lewis in 1998. |
| Chassis | Engine | Year | Group | Comment |
|---|---|---|---|---|
| JM21/133/C3 | Alfa Romeo 3.0 | CN | Raced by Gerhard Ludwig 1998 and Roland Mittländer in 1998-1999. | |
| JM21/134/C3 | Alfa Romeo 3.0 | CN | Raced by Freddy Küng in 1995-1998. | |
| JM21/136/C3 | Alfa Romeo 3.0 | CN | Raced by Robert Hahn in 1994-95. | |
| JM21/138/C3 | Alfa Romeo 3.0 | CN | Raced by Franco Foresti in 1996-2000. | |
| JM21/139/C3 | Alfa Romeo 3.0 | CN | Raced by Josef Binder in 1993-95. Raced by Adolf Gärtner in 1996-2000. |
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