BEIJING (Reuters) - Chinese electric vehicle (EV) maker BYD lifted fourth-quarter net profit by 73.1% to a record 15 billion yuan ($2.1 billion), it said on Monday, reaping the rewards from undercutting and outselling its rivals.

Fourth-quarter revenue was up 52.7% at 274.9 billion yuan, the company said in a stock market filing.

For the whole of last year, profit rose 34% to a record 40.3 billion yuan on revenue up 29%.

($1 = 7.2520 Chinese yuan renminbi)