The 1998 International Sports Racing Series was the second season of International Sportscar Racing Series (later known as the FIA Sportscar Championship). It was a series for sportscar-style prototypes broken into two classes based on power and weight, called SR1 and SR2, as well as a class of hillclimb-style sportscars, called CN. It began on April 13, 1998, and ended December 6, 1998, after 8 races.

Rnd	Race	Circuit	Date
1	Paul Ricard 2 Hours 30 Minutes	Circuit Paul Ricard	April 13
2	Brno 2 Hours 30 Minutes	Autodrom Brno Masaryk	May 17
3	Giesse ISRS Trophy (2 Hours 30 Minutes)	Misano Circuit	July 4
4	RAC Tourist Trophy (2 Hours 30 Minutes)	Donington Park	July 19
5	Anderstorp 2 Hours 30 Minutes	Scandinavian Raceway	August 16
6	DMC/ADAC Sportwagen Festival (2 Hours 30 Minutes)	Nürburgring	September 6
7	Le Mans Autumn Cup (2 Hours 30 Minutes)	Bugatti Circuit	September 19
8	Vodacom ISRS (2 Hours 30 Minutes)	Kyalami	December 6

Rnd	Circuit	SR1 Winning Team	SR2 Winning Team	CN Winning Team	Results
		SR1 Winning Drivers	SR2 Winning Drivers	CN Winning Drivers
1	Paul Ricard	#27 Horag-Lista Racing	#32 Waterair Sports	#41 Centenari Racing SRL	Results
		Fredy Lienhard Didier Theys	André Cholley Edouard Sezionale Lionel Robert	Arturo Merzario Fulvio Ballabio Robin Donovan
2	Brno	#5 JB Giesse Team Ferrari	None	#45 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri		Fabio Mancini Luca Riccitelli
3	Misano	#5 JB Giesse Team Ferrari	#32 Waterair Sports	#44 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri	André Cholley Edouard Sezionale Jean-Claude de Castelli	Felice Tedeschi Gianluca Giraudi
4	Donington	#5 JB Giesse Team Ferrari	#32 Waterair Sports	#45 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri	François Jakubowski Jean-Claude de Castelli	Fabio Mancini Luca Riccitelli
5	Anderstorp	#5 JB Giesse Team Ferrari	None	#45 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri		Fabio Mancini Luca Riccitelli
6	Nürburgring	#5 JB Giesse Team Ferrari	#32 Waterair Sports	#44 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri	Jean-Claude de Castelli François Jakubowski	Felice Tedeschi Gianluca Giraudi
7	Le Mans	#5 JB Giesse Team Ferrari	#33 Waterair Sports	#45 Tampolli Engineering	Results
		Emmanuel Collard Vincenzo Sospiri	André Cholley Pierre Bruneau	Fabio Mancini Luca Riccitelli
8	Kyalami	#19 Solution F	#33 Waterair Sports	#45 Tampolli Engineering	Results
		Jérôme Policand Gary Formato	Philippe Favre Didier Bonnet	Fabio Mancini Luca Riccitelli Denny Zardo

Points are awarded to the top 10 finishers in the order of 20-15-12-10-8-6-4-3-2-1. Only the highest placing car within a team earned points towards the championship. The SportsRacing World Cup was available to all teams that participated, but separate SR2 and CN championships were also held.

Pos	Team	Car	Engine	Rd 1	Rd 2	Rd 3	Rd 4	Rd 5	Rd 6	Rd 7	Rd 8	Total
1	JB Giesse Team Ferrari	Ferrari 333 SP	Ferrari F310E 4.0L V12		20	20	20	20	20	20		120
2	Horag-Lista Team	Ferrari 333 SP	Ferrari F310E 4.0L V12	20	8	12	15	15		15		85
3	Solution F	Riley & Scott Mk III	Ford 5.0L V8		10	15			10		20	55
4	Autosport Racing	Ferrari 333 SP	Ferrari F310E 4.0L V12	8	3	10	12	8		4		45
5	BMW Team Rafanelli	Riley & Scott Mk III	BMW 4.0L V8		15			12	15			42
6=	Target 24	Riley & Scott Mk III	Chevrolet 5.0L V8	12	6				8	12		38
6=	Tampolli Engineering	Tampolli RTA-98	Alfa Romeo 3.0L V6		4	8	10	4	6	2	4	38
8	Repsol Kremer Racing	Kremer K8 Spyder	Porsche 3.0L Turbo Flat-6	15	2	1	2			3	6	29
9	GLV Brums	Ferrari 333 SP	Ferrari F310E 4.0L V12					10		8	8	26
10	Siliprandi Racing	Lucchini P1-98	Alfa Romeo 3.0L V8			6	4	3	3			16
11	Dyson Racing	Riley & Scott Mk III	Ford 5.0L V8								15	15
12	Centenari Racing SRL	Centenari M1	Alfa Romeo 3.0L V6	10	2					1		13
13=	GTC Motorsport Lanzante	Ferrari 333 SP	Ferrari F310E 4.0L V12		12							12
13=	Waterair Sports	Debora LMP296 Debora LMP297	Cosworth 2.0L I4 BMW 3.0L I6				8		4			12
13=	Doyle-Risi Racing	Ferrari 333 SP	Ferrari F310E 4.0L V12								12	12
16	Equipe Promotion Racing	Courage C41	Porsche 3.0L Turbo Flat-6				1			10		11
17	Agusta Kremer Racing	Kremer K8 Spyder	Porsche 3.0L Turbo Flat-6			2	3		2		3	10
18	SCI	Spice SCI	Ford Cosworth 3.5L V8				6	2				8
19=	La Filière	Courage C36	Porsche 3.0L Turbo Flat-6							6		6
19=	McNeil Engineering	Lola 981	Judd GV10 3.4L V10 Judd GV4 4.0L V10					6				6
21	Cipriani Motorsport	Lucchini P3-96	Alfa Romeo 3.0L V6			3						3
22	G4 Team Gebhardt	Gebhardt G4	Audi 2.1L Turbo I5								2	2

Pos	Team	Car	Engine	Rd 1	Rd 2	Rd 3	Rd 4	Rd 5	Rd 6	Rd 7	Rd 8	Total
1	Waterair Sports	Debora LMP296 Debora LMP297	Cosworth 2.0L I4 BMW 3.0L I6			20	20		20	20	20	100
2	Mark Bailey Racing	MBR 972	Ford 3.0L V6 MG 3.0L V6				15		12			27

Pos	Team	Car	Engine	Rd 1	Rd 2	Rd 3	Rd 4	Rd 5	Rd 6	Rd 7	Rd 8	Total
1	Tampolli Engineering	Tampolli RTA-98	Alfa Romeo 3.0L V6		20	20	20	20	20	20	20	140
2=	Siliprandi Racing	Lucchini LMP1-98	Alfa Romeo 3.0L V6		10	15	15	15	15	10		80
2=	Centenari Racing SRL	Centenari M1	Alfa Romeo 3.0L V6	20	15	8	12		10	15		80
4	Cipriani Motorsport	Lucchini P3-96	Alfa Romeo 3.0L V6			10				12		22
5	Luigi Taverna	Osella PA20	BMW 3.0L I6			6			12			18
6	Osella SRL	Osella PA20	BMW 3.0L I6		8							8

• 1998 International Sports Racing Series results