| Royal Exchange Assurance Corporation | - | 20 Howard Street | Triumph 3½ H.P. Motorcycle | P 696 | Perth Municipality | 1919 |
| Royal Exchange Co | - | 20 Howard Street, Perth | Ford | 668 | Metro Private Car | 1922-23 |
| Royal Exchange Co | - | 20 Howard Street, Perth | Ford | 668 | Metro Private Car | 1923-24 |
| Royal Exchange Ins Co | - | 20 Howard Street, Perth | Dodge | 5733 | Metro Private Car | 1924-25 |
| Royal Exchange Ins. Co | - | 20 Howard Street | Dodge | 5733 | Metro Private Car | 1925-26 |
| Royal Exchange Ins. Co | - | 20 Howard Street | Dodge | 5733 | Metro Private Car | 1926-27 |
| Royal Exchange Ins. Co | - | 20 Howard Street | Dodge | 5733 | Metro Private Car | 1927-28 |
| Royal Ins. Co | - | Saint Georges House, Perth | Ford | 13125 | Metro Private Car | 1926-27 |
| Royal Ins. Coy. Ltd | - | 67 Saint George's Terrace | Ford 20 H.P. | P 494 | Perth Municipality | 1917-18 |
| Royal Insurance Co | - | Saint George's Terrace, Perth | Ford | 2319 | Metro Private Car | 1922-23 |
| Royal Insurance Co | - | 115 Saint George's Terrace, Perth | Rugby | 7465 | Metro Private Car | 1925-26 |
| Royal Insurance Co | - | Saint George's House, Perth | Ford | 2504 | Metro Private Car | 1927-28 |
| Royal Tailoring Co | - | 585 Wellington Street | Ford | 2285 | Metro Private Car | 1923-24 |
| Royal. | I. H. | Goomalling | Ford | GO ● 88 | Goomalling Road Board | 1926-27 |
| Royce | C. H. | Chester Road, Claremont | Car | CL ● 13 | Claremont Road Board | 1917-18 |
| Royce | G. H. | Pinjarra | Ford 20 H.P. | MY 20 | Murray Road Board | 1916 |
| Royce | S. G. | Wagin | Buick 20 horseppower | WM 5 | Wagin Municipality | 1915 |
| Royce | S. G. | Wagin | Buick 20 H.P. | WM 5 | Wagin Municipality | 1916 |
| Roydhouse | G. | 142 Townshend Road, Subiaco | Essex | 7632 | Metro Private Car | 1925-26 |
| Roydhouse | G. | 142 Townsend Road, Subiaco | Essex | 7632 | Metro Private Car | 1926-27 |
| Roydhouse | G. | 142 Townsend Road, Subiaco | Essex | 7632 | Metro Private Car | 1927-28 |
| Roydhouse | J. | C/o Ford Motor Co. Leighton | Ford | 8328 | Metro Private Car | 1926-27 |
| Roydhouse C/o Ford Motor Co | J. | C/o Ford Motor Co, Leighton | Ford | 8328 | Metro Private Car | 1927-28 |
| Ruake | T. | Northam | Dodge | N ● 50 | Northam Road Board | 1926-27 |
| Ruck | - | 57 De Lisle Street, North Fremantle | Chevrolet | 9264 | Metro Private Car | 1926-27 |
| Ruck | S. T. | 51 De Lisle Street, North Fremantle | Overland | 1952 | Metro Private Car | 1925-26 |
| Ruck | S. T. | 51 De Lisle Street, North Fremantle | Chevrolet Wagon | 10397 | Metro Hire or Trade | 1927-28 |
| Rucle | Quintos | Balingup | Chevrolet Truck | BN ● 53 | Balingup Road Board | 1926-27 |
| Rudall | W. | Serpentine | Ford | SJ ● 30 | Serpentine-Jarrahdale Road Board | 1925-26 |
| Rudall | W. | Serpentine | Ford | SJ ● 30 | Serpentine-Jarrahdale Road Board | 1926-27 |
| Rudall | W. | Serpentine | Ford | SJ ● 30 | Serpentine-Jarrahdale Road Board | 1927-28 |
| Rudall | William F. | Serpentine | Ford | SJ ● 30 | Serpentine-Jarrahdale Road Board | 1923-24 |
| Rudd | A. | - | Ford | BA ● 9 | Broad Arrow Road Board | 1917-18 |
| Rudd | A. | - | Overland | BA ● 9 | Broad Arrow Road Board | 1919 |
| Rudd | A. C. | - | Overland | K ● 9 | Kalgoorlie Road Board | 1922-23 |
| Rudd | A. C. | 51 Egan Street | Overland | KMC 198 | Kalgoorlie Municipal Council | 1925-26 |
| Rudd | E. A. | Wongan Hills | Chevrolet Truck | WB ● 250 | Wongan-Ballidu Road Board | 1927-28 |
| Rudd | F. T. | Bunbury | Ford | BY 42 | Bunbury Municipality | 1927-28 |
| Rudd | T. A. | Donnybrook | Rugby | PE ● 178 | Preston Road Board | 1927-28 |
| Rudd | W. | Donnybrook | Ford | PE ● 42 | Preston Road Board | 1927-28 |
| Rudd | W. E. | Donnybrook | Ford Truck | PE ● 168 | Preston Road Board | 1927-28 |
| Rudd Bros | - | Piawaning | Overland | VP ● 40 | Victoria Plains Road Board | 1926-27 |
| Rudd Bros | - | Piawaning | Overland | VP ● 40 | Victoria Plains Road Board | 1927-28 |
| Ruddaway | H. L. | - | Vulcan | NR ● 15 | Northampton Road Board | 1926-27 |
| Ruddaway | J. T. | Northampton | Overland 20 H.P. | NR ● 8 | Northampton Road Board | 1917-18 |
| Ruddaway | J. T. | Northampton | Overland 20 H.P. | NR 8 | Northampton Road Board | 1919 |
| Ruddaway | J. T. | Northampton | Overland 20 H.P. | NR ● 8 | Northampton Road Board | 1922-23 |
| Ruddaway | J. T. | Northampton | Overland 20 H.P. | NR ● 8 | Northampton Road Board | 1923-24 |
| Ruddaway | J. T. | Isseka | Dodge | NR ● 86 | Northampton Road Board | 1924-25 |
| Ruddaway | J. T. | Isseka | Dodge | NR ● 86 | Northampton Road Board | 1925-26 |