Table:
text: 1992 Australian Touring Car season
Results and standings
Race calendar
Date_ Series Circuit City_State Winner Team Car Report_
23 Feb ATCC Round 1 Amaroo Park Sydney, New South Wales Mark Skaife Winfield Team Nissan Nissan Skyline R32 GT-R 
8 Mar ATCC Round 2 Sandown International Raceway Melbourne, Victoria John Bowe Shell Ultra-High Racing Ford Sierra RS500 
15 Mar ATCC Round 3 Symmons Plains Raceway Launceston, Tasmania Glenn Seton Peter Jackson Racing Ford Sierra RS500 
5 Apr ATCC Round 4 Winton Motor Raceway Benalla, Victoria Mark Skaife Winfield Team Nissan Nissan Skyline R32 GT-R 
3 May ATCC Round 5 Lakeside International Raceway Brisbane, Queensland Tony Longhurst Benson & Hedges Racing BMW M3 Evolution 

text: 1992 Australian Touring Car season
Results and standings
Race calendar
Date_ Series Circuit City_State Winner Team Car Report_
24 May ATCC Round 6 Eastern Creek Raceway Sydney, New South Wales John Bowe Shell Ultra-High Racing Ford Sierra RS500 
31 May ATCC Round 7 Mallala Motor Sport Park Mallala, South Australia Mark Skaife Winfield Team Nissan Nissan Skyline R32 GT-R 
7 Jun ATCC Round 8 Barbagallo Raceway Perth, Western Australia John Bowe Shell Ultra-High Racing Ford Sierra RS500 
21 Jun ATCC Round 9 Oran Park Raceway Sydney, New South Wales Mark Skaife Winfield Team Nissan Nissan Skyline R32 GT-R 
13 Sep Drink/Drive Sandown 500 Sandown International Raceway Melbourne, Victoria Larry Perkins , Steve Harrington Bob Jane T-Marts Racing Holden VL Commodore SS Group A SV report

text: 1992 Australian Touring Car season
Results and standings
Race calendar
Date_ Series Circuit City_State Winner Team Car Report_
4 Oct Tooheys 1000 Mount Panorama Circuit Bathurst, New South Wales Mark Skaife , Jim Richards Winfield Team Nissan Nissan Skyline R32 GT-R report
8 Nov Clarke Shoes Group A Finale Adelaide Street Circuit Adelaide, South Australia Jim Richards Winfield Team Nissan Nissan Skyline R32 GT-R

Question: How many races were there in total in the 1992 Australian touring car season?

Question: Which car model won the most races in the 1992 Australian touring car season?