The V6 at 60 ° Alfa Romeo 2.5 liters was born in the first 70’s by the engineer Giuseppe Bussowhich began an experimentation of some technical solutions of this unit as early as 1968. It was to be an engine destined for the new flagship Alpha 6more compact than its predecessor 6 in line and potentially capable of racing in various categories.
Features Alfa Romeo V6 Busso engine
The first series of this motor Alfa Romeo, equipped with plant of injectionwas first mounted in 1978 on the Alfa 6, powered by carburetors. Had bore 88 mm And stroke 68.3 mmwith a tree on the head per bank, 2 valves per cylinder of which the discharge one controlled with a return tappet and delivered 158 hp.
In the 1983provided with electronic injectionreached the power of 165 hp and was mounted on Alfa 90, GTV6, Croma, Magnum Fissore, Alfa 75 and other cars of the Group. Model 2 liters 12 valves it was presented in three versions: fueled by carburetors (136 PS)injection (132 PS) and turbo (235 hp on the 164). Then the 3 liter 12 valve 210 HP and the updated version of the 2.5 injection with 190 hp.
Alfa Romeo V6 Busso engine as it is done
This particular Alfa Romeo engine, to get a combustion chamber more compact and better fluid dynamics, it was developed with 4 camshafts 24 valves, 3 liters and 3.2 liters for a maximum power of 250 hp in the units of 156 and 147 GTA. The thrusters remained at the stage of prototypes were the biturbo 2500 and 3000with powers up to 410 hp and the 3.5-liter aspirated 300 hp.
A was also made 2000 250hp 24-valve turbo. In competitions the V6 Busso won a lot, becoming European touring champion with the GTV6 on several occasions and on prototype sports cars both on the track and in uphill races.
Alfa Romeo V6 Busso engine in the DTM
Victory in DTM from the 155 V6 TIHowever, it was not captured by the V6 Busso but by a very different unit: the regulation required to maintain the basic characteristics of the standard engine (number and center distance of the cylinders, angle of the cylinder banks), leaving the designers free to completely redesign it. It is the first V6 DTMthe one with the angle between banks of 60 °was born precisely starting from the “measures” of the V6 Busso.
Taking advantage of the regulation, however, the 60 ° angle was abandoned in place of the 90 ° angle of the engine PRV (Peugeot Renault Volvo, their creators) used on Thema: in this way it was possible to design a new one More compact 90 ° V6 (the connecting rods were side by side 2 by 2 on the same shaft pin!) which allowed to go from 410 HP to well 490 hpmaking it shorter than 7 cm.
The V6 Busso was always built in the factories of Arese until December 2005, when these were decommissioned and the assembly line abandoned.
Versions marketed V6 Busso Alfa Romeo engine
DISPLACEMENT | CV | CAR MODELS ON WHICH IT WAS FITTED |
2.5 12V | 158 | Alpha 6 |
2.5i 12V | 156-165 | Alfa 6, Alfa 90 QO, Alfetta GTV6 2.5, 155 V6, Alfa 75 QV / Milano, Fiat Croma 2.5, Rayton Fissore Magnum V6 |
2.0 12V | 132-136 | Alpha 6 |
2.0i 12V | 132 | Alfa 90 2.0 V6 CEM |
2.0i Turbo 12V | 201-235 | 164 V6 Turbo, 164 Super V6 TB, 166 V6 TB, GTV (916) V6 TB, Spider (916) V6 TB |
3.0i 12V | 188-210 | Alfa 75 3.0 V6, 164 3.0 V6, 164 QV, Spider (916) V6, Lancia Thema 3.0 V6, SZ, RZ |
2.5i 24V | 190 | 156 V6 24v, 166 2.5 V6 |
3.0i 24V | 210-232 (260 prototype) | 164 V6 24v, 164 Q, 164 Q4, Lancia K V6, GTV (916) 3.0 V6 24v, Spider (916) 3.0 V6 24v, 166 3.0 V6 24v, 164 Proteo (prototype) Lancia Kappa and Thesis 3.0 V6 24v, Gillet Vertigo |
3.2i 24V | 240-250 (300 concept) | 147 GTA, 156 GTA, GT 3.2 V6 24v, 166 3.2 V6, GTV (916) 3.2 V6 24v, Spider (916) 3.2 V6 24v, Diva (concept) Lancia Thesis 3.2 V6 |
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