Overall, Brunel is 29 in the world, up from 44 in 2013.
The 'Top 100 Under 50' ranking uses the same 13 indicators as the THE World University Rankings, but is modified to reflect the special characteristics of younger universities.
Scores are based on these five headline categories: Research, citations, teaching, international outlook and industry income.
The Top 100 under 50 list gives younger universities a chance to shine in a competitive market.
A spokesman for Brunel said its aim now is to become more research-intensive. Income from research has doubled to £37.5million the past year.
Brunel’s vice-chancellor Professor Julia Buckingham said: “Being fourth in the UK gives us a great platform to build on. Profound change is happening in the market for education and research but we at Brunel are ambitious and well placed to take on our older competitors. Given our upcoming 50th birthday celebrations in 2016, this accolade comes right on time.”
The UK and Australia have the joint highest number of young universities in the Top 100.
The full results can be read here: www.timeshighereducation.co.uk/world-university-rankings/