Alfa Romeo Twin Spark (TS) technology was used for the primary time within the Alfa Romeo Grand Prix automobile in 1914.[1] within the early Nineteen Sixties it absolutely was employed in their race cars (GTA, TZ) to change it to realize the next power output from its engines. And within the early and middle Eighties, Alfa Romeo incorporated this technology into their road cars to boost their performance and to accommodates stricter emission controls.
In the current Alfa Romeo world the "Twin Spark" name typically refers to the twin ignition engines put in in Alfa Romeo cars. The 8-valve engine was fitted at first to the Alfa Romeo seventy five however conjointly the 164 and one hundred fifty five. The 16-valve engines appeared within the a hundred forty five, 146, 155, 156, 147, 166, Alfa Romeo GTV & Spider and Alfa Romeo GT models.
The two sparks on the Alfa twin spark engines fire one when the opposite on the facility stroke inflicting higher compression because the flame front travels across the combustion chamber. The 2nd spark fires within the additional compressed combine, guaranteeing a cleaner burn and fewer unburnt fuel within the exhaust moreover as a better physical science potency. The 8V units have 8 identical spark plugs, whereas the 16V ones have a bigger and a smaller introduce every cylinder. On the later 16v TS there area unit four freelance 8-ampere coils, connected to plugs; 1a and 4a, 1b and 4b, 2a and 3a, 2b and 3b. This arrangement facilitates the separate firing of the spark plugs in every combustion chamber, and additionally saves components by utilising a "wasted spark" system, wherever - between the exhaust and body of water stroke of every pistons "partner" - a useless spark happens, this could improve emissions terribly slightly, however the intention is to scale back price. The common TS 16V engines, 1.6, 1.8 and 2.0, all use a ten millimeter diameter and a fourteen millimeter diameter Pt conductor electrical device per cylinder.
2 valve Twin Spark engines
• 1.7 L 1749 cc 84 kW (115 PS) @6000 rpm, 146 N·m (108 ft·lbf) @3500 rpm
• 1.8 L 1773 cc 98 kW (129 PS) @6000 rpm, 165 N·m (122 ft·lbf) @5000 rpm
• 2.0 L 1962 cc 109 kW (148 PS)@5800 rpm, 186 N·m (137 ft·lbf) @3000 rpm
• 2.0 L 1995 cc 104 kW (143 PS) @6000 rpm, 187 N·m (138 ft·lbf) @5000 rpm (cat.)
applications:
• Alfa Romeo 75
• Alfa Romeo 155
• Alfa Romeo 164
4 valve Twin Spark engines
• 1.4 L 1370 cc 76 kW (103 PS) 6300 rpm, 124 N·m (91 ft·lbf) @4600 rpm
• 1.6 L 1598 cc 77-88 kW (105-120 PS) @5600-6200 rpm, 140-146 N·m (103-108 ft·lbf) @4200-4500 rpm
• 1.8 L 1747 cc 103-106 kW (140-144 PS) @6500 rpm, 163-169 N·m (120-125 ft·lbf) @3500-3900 rpm
• 2.0 L 1970 cc 110-114 kW (150-155 PS) @6400 rpm, 181-187 N·m (133-138 ft·lbf) @3500-3800 rpm
applications:
• Alfa Romeo 145
• Alfa Romeo 146
• Alfa Romeo 155
• Alfa Romeo 164
• Alfa Romeo GTV (Type 916)
• Alfa Romeo Spider (Type 916)
• Alfa Romeo 156
• Alfa Romeo 147
• Alfa Romeo 166
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