Salvatore Diomante is an automobile engineer and restorer, best known as
Bizzarrini's factory manager in the 1960s. He started his own firm in 1968; one of his first contracts involved building the
AMC AMX III.

Diomante resides in
Nichelino, Italy and operates Autocostruzioni S.D., where he keeps parts, special tools and original moulds from
Bizzarrini P538
The P538 or P538S was a rear-engined race car launched in late 1965 or early 1966 by Scuderia Bizzarrini of Livorno, Italy.
The cars used five-speed manual transaxles with gearing specific to the race for which each car was constructed. Braking ...
s and
Bizzarrini 5300s. He rebuilds and restores old Bizzarrini cars, as well as other Italian exotic cars.
He usually is called by owners to make spare parts. Some info talk about some new cars and replicas built using original and old sourced parts.

In the eighties, Diomante offered stretched versions of several Italian cars. A long wheelbase
Fiat 131
The Fiat 131 is a mid-size family car manufactured and marketed by Fiat from 1974 to 1984 after its debut at the Turin Motor Show#1974, 1974 Turin Motor Show. Available as a two-door and four-door Saloon (car), saloon and 5-door station wagon, ...
and a
Maserati Quattroporte
The Maserati Quattroporte () is a four-door full-size luxury sedan produced by Italian automobile manufacturer Maserati. The name translated from Italian means " four doors". The production of the sixth generation ended in late 2023, with the ...
elongated by 65 cm were some of his efforts. The Quattroporte offered a sumptuous interior and a correspondingly high price tag of 210 million
lire. The stretched 131, called the SD 131 Diplomatic, sat on a 60 cm longer wheelbase than usual and was thus nearly 5 metres long. It was a four-door sedan with an added middle row of seats.
Diomante also constructed a stretched
station wagon
A station wagon (American English, US, also wagon) or estate car (British English, UK, also estate) is an automotive Car body style, body-style variant of a Sedan (automobile), sedan with its roof extended rearward over a shared passenger/cargo ...
version of the
Lamborghini LM002
The Lamborghini LM002 is an off-road vehicle manufactured by Lamborghini between 1986 and 1993. The LM002 was an unusual departure for Lamborghini which, at the time, was primarily known for high-performance, hand-built, super/sports cars. The L ...
for the
Sultan of Brunei
The Sultan of Brunei is the monarchical head of state of Brunei and head of government in his capacity as prime minister of Brunei. Since independence from the British in 1984, only one sultan has reigned, though the royal institution dates bac ...
. They also carried out stretched conversions and
landaulette
A landaulet, also known as a landaulette, is a car body style where the rear passengers are covered by a convertible top. Often the driver is separated from the rear passengers by a division, as with a limousine.
During the first half of the 20t ...
s on Rolls-Royce and Bentley basis.
References
Italian automotive engineers
Living people
Year of birth missing (living people)
Coachbuilders of Italy
{{Italy-autoracing-bio-stub