1978 Australian Touring Car Championship
The 1978 Australian Touring Car Championship was a CAMS sanctioned Australian motor racing title open to Group C Touring Cars. The title, which was the 19th Australian Touring Car Championship, was won by Peter Brock. It was his second Australian Touring Car Championship victory.
For the second time in the history of the championship, the point score regulation which specified that not all results counted had an effect on the championship outcome. Bob Morris finishing the series on 53 points, two less than championship winner Peter Brock, after Morris lost the two points awarded for his fifth placing at Amaroo Park. However, the regulation did not actually change the championship winner as Brock would otherwise have won the title due to the tiebreaker rule with three round wins to one for Morris. Third in the championship was the consistent Rod Stevens driving his Under 3.0 litre Ford Escort RS2000. Stevens benefited from the point system that favoured the small class cars by giving bonus points for class placings.
In his first ATCC since 1973, five time series champion Ian Geoghegan won his ninth and last ever ATCC race when he drove his Bob Jane owned Holden Torana to a surprise win in Round 4 at Sandown. In what would be his last ATCC season, Geoghegan finished 13th in the championship.
Calendar
The championship was contested over an eight round series.| Rd. | Race/Circuit | Location / State | Date | Format | Round winner | Car | Entrant |
| 1 | Symmons Plains Symmons Plains | Launceston, Tasmania | 5 March | One race | Peter Brock | Holden LX Torana A9X | Marlboro Holden Dealer Team |
| 2 | Oran Park Oran Park | Sydney, New South Wales | 26 March | One race | Peter Brock | Holden LX Torana A9X | Marlboro Holden Dealer Team |
| 3 | Amaroo Park Amaroo Park | Sydney, New South Wales | 9 April | One race | Allan Grice | Holden LX Torana A9X | Craven Mild Racing |
| 4 | Sandown Sandown | Melbourne, Victoria | 16 April | One race | Ian Geoghegan | Holden LX Torana A9X | Bob Jane T-Marts |
| 5 | Wanneroo Wanneroo Park | Perth, Western Australia | 7 May | Two heats | Peter Brock | Holden LX Torana A9X | Marlboro Holden Dealer Team |
| 6 | Calder Calder Park Raceway | Melbourne, Victoria | 28 May | One race | Bob Morris | Holden LX Torana A9X | Ron Hodgson Channel 7 Racing Team |
| 7 | Round 7 Presented by Rothmans Lakeside | Brisbane, Queensland | 25 June | One race | Allan Moffat | Ford XC Falcon | Moffat Ford Dealers |
| 8 | Adelaide International Raceway Adelaide International Raceway | Virginia, South Australia | 8 August | One race | Colin Bond | Ford XC Falcon | Moffat Ford Dealers |
Classes
Car competed in two engine displacement classes:- Up to and including 3000 cc
- 3001 to 6000 cc
Points system
Bonus points were awarded on a 4–3–2–1 basis to the first four placegetters irrespective of class.
Only the best six scores counted towards the championship totals.
Where a round was contested in two parts, points were allocated on a 20–16–13–11–10–9–8–7–6–5–4–3–2–1 basis to the first 14 place-getters in each part and then aggregated. If more than one driver attained the same total, the superior round placing was awarded to the driver who was higher placed in the last part. Championship points were then awarded for the round.