The 1964 Sandown 6 Hour International was an endurance race for saloon cars complying with FIA Group 1 regulations. The event was held at the Sandown Park circuit in Victoria on 29 November 1964 and was the genesis of what we now know as the Sandown 500.
Entries competed in seven classes as follows :
Class G was created to cater for entries which were modified to FIA Group 2 specifications. These entries were ineligible for outright placing prizemoney.
Results for the event are given below.
| Position | Drivers | No. | Car | Class | Laps | ||
| 1 | Roberto Bussinello, Ralph Sachs | 50 | Alfa Romeo TI Super | E | 230 | ||
| 2 | Peter Manton, Brian Foley | 62 | Morris Cooper S | F | 223 | ||
| 3 | Geoff Russell, John Raeburn | Ford Cortina GT | E | 223 | |||
| 4 | Allan Moffat, Jon Leighton | Lotus Cortina | G | 220 | |||
| 5 | I Cooke, Bruce Hindhaugh | Morris Cooper S | F | 211 | |||
| 6 | Paddy Hopkirk, John Fitzpatrick | Morris Cooper S | F | 204 | |||
| 7 | Bill Burns, Brian Lawler | Fiat 2300 | C | 202 | |||
| 8 | C Giltrap, Ivan Segedin | Volvo 122S | D | 201 | |||
| 9 | Brian Muir, Bill Brown | Datsun SS | F | 201 | |||
| 10 | Spencer Martin, Ron Clarke | Datsun SS | F | 201 | |||
| 11 | Bruce McPhee, Fred Morgan | Holden 179M | B | 201 | |||
| 12 | Bob Jane, George Reynolds | 51 | Lotus Cortina | E | 200 | ||
| 13 | Ann Bennett, John Colwell | Toyota Crown | D | 200 | |||
| 14 | P Owen, Kevin Bartlett | Mercedes-Benz 220SE | C | 198 | |||
| 15 | I McDonald, C Fisher | Peugeot 404 | D | 197 | |||
| 16 | L Stewart, B Rossiter | 63 | Morris Cooper S | F | 197 | ||
| 17 | Alan Mottram, Fred Sutherland | Studebaker Lark | A | 196 | |||
| 18 | John Eiffeltower, C Smith | Chrysler Valiant | A | 195 | |||
| 19 | A Osborne, K Burns | Ford Zephyr | B | 192 | |||
| 20 | Paul England, D Stewart | Volkswagen 1500S | D | 190 | |||
| 21 | R Thurston, Brian Sampson | 45 | Triumph 2000 | D | 189 | ||
| 22 | B Topen, D Cooke | Fiat 2300 | C | 187 | |||
| 23 | Roger Ward, Warren Weldon | Studebaker Lark | A | 187 | |||
| 24 | Bob Holden, B Ferguson | Volkswagen 1500S | F | 182 | |||
| 25 | D Leighton, Kaye Whiteford | Morris 1100 | F | 179 | |||
| 26 | H Gibson, H Gibson Jr. | Triumph Herald | F | 176 | |||
| 27 | A Cooper, J Hills | Ford Cortina GT | D | 171 | |||
| 28 | Frank Matich, Rod Blair | 14 | Jaguar 3.8 | A | 157 | ||
| DNF | Timo Makinen, Raubi Altonen | Morris Cooper S | F | ||||
| DNF | Jackie Stewart, Jim Palmer | Lotus Cortina | D | ||||
| DNF | Lex Davison, Gawaine Baillie | 1 | Ford Galaxie | G | |||
| DNF | Alan Hamilton | Peugeot 404 | D | ||||
| DNF | Frank Coad, John Roxburgh | 21 | Vauxhall Velox | B |
| Preceded by None |
Sandown 6 Hour International 1964 |
Succeeded by 1965 International 6 Hour Touring Car Race |