Beetle goes Boxster: performances of a New Beetle with Porsche Boxster flat6 engine
|Engines not yet available in the New Beetle|
The New Beetle is now only available as a 2.0 liter and 1.9 liter TDI version. But perhaps more powerful engine from the Volkswagen stock will follow. This a preview which driving performances will be possible if a 1,8 liter turbocharged engine, already used in other VW/Audi-vehicles, would be implemented into the New Beetle. From the technical point of view this transformation should be possible without major problems. Probably the Wolfsburg engineers and designers already started (or perhaps finished?) their work on this.
Tuned version of the 1.8 liter turbocharged engine
Alternatively to the 1.8 turbo engine flat4 shows the performaces of a tuned 1.8 liter version, which is improved in these points:
Calculation of the driving performances
The input of the calculation ist the engine torque versus
revs curve shown in the diagram for the 1.8T - and the 1.8T tuned engine.
The most important losses like drivetrain friction and
moments of inertia of rotating masses are taken into account. As a result
the tractive wheel forces are being calculated. The actual vehicle acceleration
is given as the difference of the offered tractive force due to the engine
performance and the "used" force e.g. drag and rolling resistance.
Top speed will be reached when the offered tractive force equals the drag force plus the rolling resistance. Straight ahead driving on dry road surface without trailer and no road gradient is assumed. The delay between shifting is 0.5 seconds. Upshifting is done at 6000 1/min.
The following technical data were used for the calculation of the driving performances.
|Engine:||1.8T 4 cyl. in line 5V (EA113)||1.8T 4 cyl. in line 5V tuned version|
|displacement||1,781 Liter||1,781 Liter|
|supercharging||turbocharged||turbocharged - intercooled|
|power||150 bhp at 5700 1/min||195 bhp at 5800 1/min|
|engine torque||210 Nm at 1750 1/min||300 Nm at 2200 1/min|
|curb weight||1252 kg (estimated)||1252 kg (estimated)|
|cd drag coeff.||0,385||0,385|
|ratio 1st gear||3,300||3,300|
|ratio 2nd gear||1,940||1,940|
|ratio 3rd gear||1,308||1,308|
|ratio 4th gear||1,029||1,029|
|ratio 5th gear||0,837||0,837|
The calculated performaces of the New Beetle with 1.8 turbo engine are slighly lower than on the comparable Audi A3 1.8T or VW Golf GTI 1.8T because the windresistance of the Beetle body is about 20% higher. But however the performanced of such a Beetle are nearly on the same level than those of a BMW 320i or Audi A4 Avant 1.8T. This is quite remarkable! The calculated values can be reduced significantly by further options like air condition, larger tyres etc.
|New Beetle||1.8T 5V turbo||1.8T 5V tuned version||comparison between 1.8 5V turbo and Beetle 2.0|
|top speed||209 km/h||222 km/h||180 km/h (auto zeitung 4/98), this is +29 km/h|
|acceleration 0 to 100 km/h||8,7 sec||7,2 sec||11,8 (auto zeitung 4/98), this is -3,1 sec|
|time for one km from stillstand||32,3 sec||30,0 sec||36,5 sec (flat4), this is -12%|
|top speed comparison||acceleration comparison|
The fuel consumption according to the European "Richtlinie 93/116/EG" should be about 11,0 l/100km (City cycle), 6,5 l/100km (rural roads). This is about 26 mpg.
The fuel consumption of the tuned 1.8 liter turbo engine should be about 13 l/100 km or 19 mpg. In every case a sporty tuned suspension (wheels 225/45 ZR 17 on rims 8J x 17) and an improved brake system should be fittet.
Let's look forward to that engine available in the New Beetle!
|Beetle goes Boxster|
||in comparison to the Beetle 2.0|
|top speed||227 km/h||180 km/h (auto zeitung 4/98), this is +47 km/h|
|acceleration 0 to 100 km/h||6,8 sec||11,8 (auto zeitung 4/98), this is -5,0 sec|
|time for one km from standstill||30 sec||36,5 sec (flat4), this is -18%|
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