Based on the information provided about the 1961 Ford Thunderbird:

* The vehicle was a full-size personal luxury car produced by Ford Motor Company for its Mercury division.

* It was offered as a Convertible and Hardtop Coupe in three body styles: base, sport convertible with vinyl top and delete option package (which deleted items like the chrome exhaust tip), plus an Executive hardtop coupe that added interior trim such as simulated walnut grain dashboard inserts along with other luxury features at no extra cost!

* Engine options included a 390 cuin V8 producing around 300 HP @ 4500 RPM through either a three-speed manual or one of two four speed automatic transmissions (3 Speed Cruise-O-Matic and Automatic Ford-O-Matic).

* The fuel economy for the base model with an estimated EPA rating was about 12 miles per gallon city /17 highway.

In conclusion, based on these specifications alone it appears this particular year's offering had good performance capabilities given its time frame while still managing decent gas mileage considering overall size & weight distribution across all three trim levels available at purchase price points ranging from approximately $4k-$5K depending upon options chosen naturally.

Thunderbird 1961