How about the Lancia Stratos? Don't quote me on this, but I'm pretty sure it was his design also if I'm not mistaken.
The Washington Post obituary today:
"For Ferrari, Mr. Pininfarina oversaw the body design of the 1968 Daytona, known for its long, sloping hood; the 1984 Testarossa and its dramatically vented doors; and the 1987 F40, with its signature rear wing. His last contribution was the 2002 Enzo supercar, inspired by the low-slung bodies of Ferrari’s champion Formula 1 cars.
...His 1965 Dino Berlinetta Speciale, a prototype with swooping front fenders, greatly influenced future generations of Ferraris...."
Also apparently 250 GTO and 250 GTE in the early 1960's.
Wiki said "Pininfarina designed (and partially assembled) the Cadillac Allanté. The car's bodies were assembled and painted in Italy before being flown to Detroit for final vehicle assembly."
Sergio was born in 1926 and joined his father's firm. I knocked off the designs from before 1950. Under Notable Designs for the Pininfarina company, the company is credited with working on (some are only partial credit, but still... nice list!):
* 1952 Ferrari 250
* 1952 Nash Ambassador[3]
* 1952 Nash-Healey[4]
* 1953 Four Berlinetta and one Spyder version of the Maserati A6GCS/53
* 1955 Ferrari 410 Superamerica
* 1955 Peugeot 403
* 1956 Austin A40 Farina
* 1957 Lancia Flaminia
* 1958 BMC Farina cars - Austin A55 Cambridge Mk II, MG Magnette Mk III, Morris Oxford V, Riley 4/68, Wolseley 15/60
* 1959 Fiat 1800/2100
* 1960 Ferrari 250 GTE
* 1960 Peugeot 404
* 1961 Fiat 2300
* 1961 Cadillac "Jacqueline" Brougham Coupé (named after Jacqueline Kennedy)[5]
* 1962 BMC ADO16
* 1963 Chevrolet Corvair Super Spyder Coupé (2 built)[6]
* 1963 Chevrolet Corvette Rondine Coupé[7]
* 1963 Datsun Bluebird 410
* 1963 Mercedes-Benz 230SL concept car ("Pininfarina Coupé")
* 1964 Ferrari 275
* 1965 Ferrari Dino 206
* 1965 MGB GT
* 1965 Nissan Cedric 130
* 1966 Alfa Romeo Spider 1600 Duetto
* 1966 Ferrari 330 GTC
* 1966 Fiat 124 Sport Spider
* 1966 Fiat Dino Spider
* 1966 IKA-Renault Torino
* 1967 Proposal for replacement for BMC 1100 (ADO16)
* 1967 Proposal for replacement for BMC 1800 (ADO17)
* 1968 Ferrari Daytona
* 1968 Peugeot 504 Cabriolet and Coupe
* 1971 Fiat 130 Coupe
* 1971 Ferrari 365 GTC/4
* 1973 Ferrari 365 GT4 BB
* 1975 Ferrari 308
* 1975 Lancia Montecarlo
* 1975 Rolls-Royce Camargue
* 1976 Peugeot Peugette concept car[8]
* 1978 Jaguar XJ6
* 1980 Ferrari Pinin
* 1984 Ferrari Testarossa
* 1984 Ferrari 288 GTO
* 1984 Honda HP-X concept car[9]
* 1985 Ferrari 328
* 1985 Peugeot 205 Cabriolet and Saloon (4 doors) based on Gerard Welter's initial design of the 205 (1983)
* 1987 Alfa Romeo 164
* 1987 Cadillac Allanté
* 1987 Ferrari F40
* 1987 Peugeot 405
* 1989 Ferrari 348
* 1989 Ferrari Mythos
* 1992 Jaguar XJ220—rebodied an unknown number of cars
* 1992 Ferrari 456 GT
* 1993 Fiat Coupé - Interior only
* 1993 Peugeot 306
* 1994 Ferrari F355
* 1994 Peugeot 306 Cabriolet
* 1995 Alfa Romeo GTV & Spider
* 1995 Ferrari F355 Spider
* 1995 MG F - Roof Structure only
* 1996 Ferrari 550 Maranello
* 1996 Lancia Kappa SW
* 1997 Peugeot 406 Coupé
* 1999 Mitsubishi Pajero
* 1999 Songhuajiang Hafei Zhongyi
* 2000 Daewoo Tacuma
* 2000 Ferrari 360 Spider
* 2000 Ferrari 550 Barchetta
* 2001 Citroën Osée
* 2001 Hyundai Matrix
* 2002 Daewoo Nubira/Lacetti saloon and station wagon
* 2002 Enzo Ferrari
* 2002 Ferrari 575M Maranello
* 2002 Hafei Lobo
* 2003 Maserati Quattroporte
* 2004 Ferrari 612 Scaglietti
* 2004 Ferrari F430
* 2005 Hyundai Matrix
* 2005 Maserati Birdcage 75th
* 2005 Peugeot 1007
* 2006 Ferrari 599 GTB Fiorano
* 2006 Ferrari P4/5 by Pininfarina
* 2006 Mitsubishi Colt CZC
* 2006 Volvo C70
* 2007 Brilliance BS4
* 2007 Ford Focus CC by Pininfarina
* 2008 Maserati GranTurismo
* 2008 Pininfarina B0 electric car
* 2008 Rolls-Royce Phantom Drophead Coupé Hyperion concept car
* 2009 Tata Pr1ma concept car
* 2009 Ferrari 458 Italia
* 2010 Alfa Romeo 2uettottanta concept car
* 2010 Lancia Stratos for Michael Stoschek[10]
* 2011 Ferrari FF
* 2012 Ferrari F12 Berlinetta