 Wales have won 355 of their 690 Test matches for a 51 @.@ 45 % winning record . Their biggest Test defeat was 96 – 13 loss to South Africa in 1998 , and their largest victory a 98 – 0 defeat of Japan in 2004 . Their record for most tries in a match is 16 , scored against Portugal in 1994 – they also scored 102 points in this match , more than in any other Test . Wales ' record for consecutive Test wins is eleven , and for consecutive losses is ten . 
