Check out this tour to England in 1989.
That series is in stark contrast to modern series.
Australia in England : May/Sep 1989 (6 TESTS)
Australia in England May/Sep 1989 - Test Averages
Australia in England May/Sep 1989 - Tour Averages
Australians v Duchess of Norfolk's XI at 7 May 1989, 7 May 1989
Australians v League Cricket Conference XI at 5 May 1989, 5 May 1989
Australians v Minor Counties at 17 July 1989, 17 Jul 1989
Australians v Oxford and Cambridge Universities at Oxford, 28 Jun 1989
Australians v Oxford and Cambridge Universities at Oxford, 28 Jun 1989
Australians v Scotland at 15 July 1989, 15 Jul 1989
Sussex v Australians at Hove, 9 May 1989
Marylebone Cricket Club v Australians at Lord's, 11 May 1989
Worcestershire v Australians at Worcester, 13-14 May 1989
Somerset v Australians at Taunton, 17-19 May 1989
Middlesex v Australians at Lord's, 20-22 May 1989
Yorkshire v Australians at Leeds, 23 May 1989
1st ODI: England v Australia at Manchester, 25 May 1989
2nd ODI: England v Australia at Nottingham, 27 May 1989
3rd ODI: England v Australia at Lord's, 29 May 1989
Warwickshire v Australians at Birmingham, 31 May-2 Jun 1989
Derbyshire v Australians at Derby, 3-5 Jun 1989
1st TEST: England v Australia at Leeds, 8-13 Jun 1989
Lancashire v Australians at Manchester, 14-16 Jun 1989
Northamptonshire v Australians at Northampton, 17-19 Jun 1989
2nd TEST: England v Australia at Lord's, 22-27 Jun 1989
Glamorgan v Australians at Neath, 1-3 Jul 1989
3rd TEST: England v Australia at Birmingham, 6-11 Jul 1989
Hampshire v Australians at Southampton, 19-21 Jul 1989
Gloucestershire v Australians at Bristol, 22-23 Jul 1989
4th TEST: England v Australia at Manchester, 27 Jul-1 Aug 1989
Nottinghamshire v Australians at Nottingham, 2-4 Aug 1989
Leicestershire v Australians at Leicester, 5-7 Aug 1989
5th TEST: England v Australia at Nottingham, 10-14 Aug 1989
Kent v Australians at Canterbury, 16-18 Aug 1989
Essex v Australians at Chelmsford, 19-21 Aug 1989
6th TEST: England v Australia at Kennington Oval, 24-29 Aug 1989
Australians v The Netherlands at The Hague, 2 Sep 1989
Australians v The Netherlands at The Hague, 3 Sep 1989
Australians v Denmark at Bronsby Stadium, 5 Sep 1989
Australians v Denmark at Slagelse Stadium, 6 Sep 1989
No wonder teams had a much better chance back then.
An interesting observation is that the ODI series was played before the tests. This is something that should be done now, as it at least gives the players more time to get used to foreign conditions. It may not benefit a whole test team as only perhaps half crossover, but at least half get more time to acclimatise better.