I'm pretty sure it's not a quasar, at least not the model in the 1984 catalogue. My reasons? The Quasar was the bike I drooled over aged 13, and later I have a second-hand Pulsar, its cheaper sibling. The Quasar had braze-on shifters with very distinctive curved plastic shifter levers (albeit which broke), 501 oval tubing with a fade paint job and the characteristic Reynolds logo and space shuttle logo on the seat tube, and a different Raleigh logo. Fork crown also sloped.
It might of course be a later, cheaper model with the same name, but browsing google images only brings up the 84 model:
Part of me still longs to own this bike even though there are much better models in the catalogue.
I think the only way I'm going to solve this is to go see it. I'm not expecting much from the photo though.
1983 Raleigh Gran Sport refurb
1980something Falcon (STI upgrade)
Dawes Kingpin Frankenbike (watch this space)