Evans was born in the Welsh town of Carmarthen, and his family moved to Australia when he was five years old. They settled in the Queensland city of Townsville, and later moved to Charters Towers, where he formed his first band at the age of seventeen. He later moved to Sydney.
Evans was one of several members of AC/DC before the band matured and began to play all original music, along with Colin Burgess and Larry Van Kriedt. He was a member of the band from its inception in November 1973 until September 1974 before officially being replaced by Bon Scott in October 1974. During his time with AC/DC, Evans recorded one single, a Young/Young composition ("Can I Sit Next To You, Girl"/ "Rocking in the Parlour") which was released in Australia and New Zealand. A low-budget promotional video for the demo was also shot. It peaked nationally at number 50 on the Aria (Kent) charts. The song was later re-recorded with Bon Scott. They replaced Evans with Scott while changing their sound from glam rock to harder blues rock. Evans has cited jealousy and a physical altercation with the manager during a heavy national tour as the reason for his dismissal, and has also said in interviews that the early history of AC/DC is unjustly ignored. Former AC/DC manager Michael Browning wrote in his memoir Dog Eat Dog of Evans: "No disrespect to Dave, but they wouldn't have made it with him as singer. He could sing OK, but he didn't have the character Bon brought into the band. The character, the sense of humour, the swagger. They were never going to go as far as they went with Dave out front. Bon was the real deal."
After AC/DC, Evans joined Newcastle band Rabbit, replacing original singer Greg Douglas. Rabbit released 6 singles and two albums between 1975 and 1977 with the second album, Too Much Rock N Roll released throughout Europe and Japan. His other bands included "Dave Evans & Hot Cockerel" and "Dave Evans Thunder Down Under", which released one self-titled album through Reaction Records.
Evans also released a live recording, A Hell of a Night, which was a memorial gig for Bon Scott. It was recorded on the 20th anniversary of Scott's death, with Melbourne AC/DC tribute band Thunderstruck. Since then he has released six solo CDs.
- "Can I Sit Next to You, Girl" / "Rockin' in the Parlour" (1974) (single)
- In the Beginning (live 1974) (double vinyl, bootleg – 2005)
- Rabbit (1976)
- Too Much Rock'n'Roll (1976)
With Thunder Down Under
- Dave Evans and Thunder Down Under (1986)
- A Hell of a Night (2001)
- Sinner (2004)
- Judgement Day (2008)
- Nothing to Prove (2014) – EP
- What about Tomorrow (2014) – EP
- Wild (2017) – EP
With Blood Duster
- "Sellout" – from the album Blood Duster (2003)
With John Nitzinger
- Revenge (2013) (album)