Rolls-Royce said it has not been approached by authorities in Brazil regarding bribery allegations reported by various media on Monday.
The company, a supplier of gas turbines for oil platforms, was named by a former executive of Brazilian state oil company Petrobras as having paid bribes there, Monday's Financial Times reported, citing court testimony.
"We have not received details of the allegations made in recent press reports, nor have we been approached by the authorities in Brazil," a Rolls-Royce spokesman said in an emailed statement.
The Brazilian oil company is engulfed in a widening corruption scandal in which billions of dollars were allegedly paid by companies to win contracts.
The Financial Times report said that the allegations against Rolls-Royce relate to a £65m ($100m, €87.96) contract.
Rolls-Royce on Monday reiterated its zero-tolerance approach to wrongdoing.
"We have always been clear that we will not tolerate improper business conduct of any sort and will take all necessary action to ensure compliance, including co-operating with authorities in any country," it said.
The world's second-largest maker of aircraft engines is under investigation by Britain's Serious Fraud Office (SFO) over concerns of possible bribery and corruption in China and Indonesia.
The company appointed lawyer David Gold to conduct a review of its compliance procedures after the China and Indonesia concerns came to light.