Some cars leave a paper trail; the Lotus 91 left a name and a place in Lotus's list. What follows is what can be said with a source behind it. Colin Chapman (Technical Director) / Martin Ogilvie (Chief Designer) / John Davis (Head of Aerodynamics and R&D) drew it.
Where it came from
The Lotus 91 was a car used by the English team Lotus in the 1982 Formula One season, designed by Colin Chapman, Martin Ogilvie and Tony Rudd.
Under the skin
480 hp @ 11,000 rpm is the published figure. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
In context
Its family tree is legible: it took over from the 87B; its successor was the 92. Nearby in the Lotus catalogue sit the Lotus 100T and the Lotus 101.