The 1990–91 Asian Club Championship was the 10th edition of the annual Asian club football competition hosted by Asian Football Confederation. Representative clubs of 30 Asian countries played games in this tournament. Rajabov Esteghlal FC from Iran won the final and became Asian champions for the second time. They are championed in 1970 as Taj.

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	Al-Rasheed (H)	2	2	0	0	3	1	+2	4	Qualify to Quarter-finals
2	Al-Ramtha	2	1	0	1	4	3	+1	2
3	Al-Yarmook	2	0	0	2	1	4	−3	0

Played in Baghdad, Iraq

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Esteghlal	2–1	Al-Sadd	1–1	1–0

Esteghlal qualified 2–1 on aggregate.

The Gulf Cooperation Council Club was cancelled due to the crisis in the region; the participants would have been Bahrain Club, Al-Arabi, Al-Nassr and Al-Sharjah, who all withdrew.

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	Al-Nasr	2	1	1	0	2	0	+2	3	Qualify to Quarter-finals
2	PIA FC (H)	2	1	1	0	1	0	+1	3
3	Ranipokhari	2	0	0	2	0	3	−3	0

Played in Quetta, Pakistan

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	Mohammedan SC (H)	2	2	0	0	7	1	+6	4	Qualify to Quarter-finals
2	Salgaocar SC	2	1	0	1	4	3	+1	2
3	Club Lagoons	2	0	0	2	1	8	−7	0

Played in Dhaka, Bangladesh

Run parallel with ASEAN Club Championship

Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
Pelita Jaya	2	1	1	0	2	1	+1	3	Qualify to Quarter-finals
Bangkok Bank	2	1	0	1	3	3	0	2
Geylang International (H)	2	0	1	1	1	2	−1	1

Played in Singapore

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	April 25 (H)	2	2	0	0	2	0	+2	4	Qualify to Quarter-finals
2	Liaoning FC	2	1	0	1	3	3	0	2
3	Nissan Yokohama	2	0	0	2	2	4	−2	0

Played in Pyongyang, North Korea

Played in Dhaka, Bangladesh

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	Liaoning FC	2	1	1	0	2	1	+1	3	Advance to Semi-finals
2	Pelita Jaya	2	1	0	1	3	1	+2	2
3	Al-Nasr	2	0	1	1	1	4	−3	1

Al Rasheed (Iraq) withdrew due to the Gulf War, and were replaced by Al Ramtha (Jordan), who were disqualified for not paying the second round entry fee.

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Qualification
1	Esteghlal	3	2	1	0	5	2	+3	5	Advance to Semi-finals
2	April 25	3	1	1	1	5	5	0	3
3	Mohammedan SC (H)	3	0	3	0	2	2	0	3
4	Bangkok Bank	3	0	1	2	4	7	−3	1

	Semi-finals				Final
	27 July – Dhaka
	Esteghlal	2
					29 July – Dhaka
	Pelita Jaya Jakarta	0
					Esteghlal	2
	27 July – Dhaka
					Liaoning FC	1
	Liaoning FC	3
	April 25	0
					Third place play-off
					28 July – Dhaka
					Pelita Jaya Jakarta (p)	2 (7)
					April 25	2 (6)

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• Top scorer
  • Samad Marfavi (6 goals)

• Asian Club Competitions 1991 at RSSSF.com