Volkswagen Group presented a trio of new engines with fresh tech at the recent International Vienna Motor Symposium, an annual event hosted by the Austrian Society of Automotive Engineers. The new motors range from a 12-cylinder engine for flagship cars to a new TDI unit for commercial vehicles.

6.0 litre W12 TSI engine – 609 PS, 900 Nm

Big one first. The new 6.0 litre W12 TSI engine that’s set to move flagship cars from Volkswagen, Audi and Bentley is said to be the most tech-dense engine in the world. Two combustion methods that have to date been used in parallel – Audi’s FSI direct injection and Bentley’s TMPI multi-point injection – were combined for this new engine together with other new or optimised systems and components.

New tech include cylinder bores with APS coating, an oil circuit suitable for off-road use (Bentley Bentayga?) with a switchable oil pump, a cooling system with integrated temperature management, dual fuel injection with high pressure direct and low pressure manifold injection, twin-scroll biturbo charging, individual cylinder bank deactivation (on the left in the direction of travel), engine management with two controllers as well as a start/stop system that reduces fuel consumption and emissions.

bentley mulsanne speed blue train

As this motor will be used in top luxury models, adaptive engine suspension with hydraulic basic damping, which uses electromagnetic actuators to counteract vibrations induced by the engine with phase-shifted counter-vibrations, is a significant addition for refinement.

VW says that this giant mill is the most economical 12-cylinder engine in the segment, with CO2 emissions of less than 250 g/km in the New European Driving Cycle (NEDC). Vital stats include 608 PS at 6,000 rpm and 900 Nm of torque from a low 1,500 to 4,500 rpm. Depending on the host vehicle (picture a large two-tonne limo), the W12 TSI is capable of 0 to 100 km/h acceleration in less than four seconds and top speeds of over 300 km/h.

2.0 litre TDI 4V engine – up to 204 PS, 450 Nm

On the opposite end of the scale is the new 2.0 TDI 4V engine. Plenty of innovations, but different goals.

Based on VW’s modular diesel component system (MDB), the new motor makes its debut along with the new Multivan and Transporter from Volkswagen Commercial Vehicles. The development focus was on a significant reduction in fuel consumption (by 14%, on average) while meeting strict new Euro 6 emission standards, as well as a “traction capacity oriented torque curve” with a noticeable increase in driving performance for the load luggers. The top engine in the family features a new dual-stage turbocharger layout.

To undercut the EU6 requirements for NOx and particle raw emissions, the 2.0 TDI 4V uses not only a commonrail system with 2,000 bar injection pressure, but also a new low-temperature/high-pressure exhaust gas recirculation (EGR) system and a water-cooled charge air cooler.

In addition, a variable intake manifold guarantees the necessary flow swirl when running at partial load. Before exhaust gas is spewed out, it passes an oxidation catalyst with a downstream combination of diesel particulate filter and SCR catalytic converter.

Currently, four versions of the engine cover a power range of 84 PS to 204 PS and a torque range of 220 to 450 Nm. With a specific torque output of over 225 Nm per litre of displacement, the new Transporter’s engine is hailed by its maker as the benchmark in its segment. The starter engine’s torque has also increased significantly, demonstrating the advantages of the variable turbine geometry (VTG) high-pressure stage within the biturbo charging unit. For the top-of-the-range unit, the old two-stage charging was redesigned and augmented by another VTG in the high pressure stage.

1.0 litre three-cylinder TSI EA211 – 272 PS, 270 Nm

Lastly, VW offered a preview of a high-performance three-cylinder TSI based on the existing EA211 engine. Touting the genes of the Polo R WRC’s rally winning engine, this power unit is capable of generating 272 PS and 270 Nm of torque from just one litre of displacement, thanks to a monoscroll turbocharger and e-booster. Yes, 272 PS from a 1.0 litre three-pot. “A nice example of just how much potential combustion engines still have in them,” a smiling Dr. Heinz-Jakob Neußer said.

Neußer, a member of the board of management for the Volkswagen brand and Volkswagen Group Head of Powertrain Development, insists that the good old ICE is not going to fade away anytime soon.

“The optimisation of the internal combustion engine is still an important field of innovation. High-efficiency TDI and TSI/TFSI engines – ideally in combination with DSG – will remain indispensable for the foreseeable future. The reduction of CO2 emissions from internal combustion engines is pure high-tech nowadays. Examples of this are our high rpm diesel as well as the high-performance three-cylinder TSI engine.

“Climate protection is an integral part of our responsibility towards people and society. Moreover, customers demand models with reduced consumption and lower emissions and politics also makes high demands on the automotive industry,” his noted in his concluding presentation, underlining the paramount goal of VW’s powertrain development.