Showing posts with label fuelconsumption. Show all posts
Showing posts with label fuelconsumption. Show all posts

Friday, 25 February 2022

Colin-on-Cars - Volkswagen's records still stand

Colin-on-Cars - Volkswagen's records still stand

A nearly missed note in my email inbox triggered a nostalgic rush – February 23 was the 20th anniversary of the date the Volkswagen W12 broke seven world speed records on the famed Nardò circuit in Italy.

On that date the W12 Nardo covered a distance of 7 694 kilometres and sustained an average speed of 200,6 mph (320,96 km/h). In achieving this average speed, the W12 Nardo set seven world records and 12 international class records in the process.

Volkswagen W12 Nardo

Volkswagen could then lay claim to nine of 12 world records relating to distance and time. The additional two were set by the ARVW (Aerodynamic Research VW) in 1980. According to the Federation International de l’Automobile (FIA), all nine world records stand to this day.

It was that mention of the ARVW that triggered things because shortly after establishing its records, I had the opportunity to drive this remarkable car – albeit at very slow speed around a skid pan at Volkswagen’s research centre.

The author with the ARVW in 1980

The near cylindrical shape and very narrow track meant it was not designed to turn corners at anything more than a snail’s pace. Rather it was intended for a high-speed banked circuit.

Still, the experience brought home the technology of the time working – in the wake of a fuel crisis – to improve efficiencies, reduce drag and eke out minimal consumption.

Called the ‘Aerodynamic Research Volkswagen’, the project was born as a result of the oil crisis of the 1970s and arrived at the test track in late 1980. The price of oil had spiked, sending shockwaves throughout the world and hitting the oil-dependent automotive industry especially hard. Automakers went from pumping out big, fuel-burning V8s to figuring out how to maximize efficiency. 



The ARVW was a study in demonstrating how an attention to aerodynamics and weight reduction can produce high speeds from considerably lower power. 

The first challenge in creating this super-light, air-slicing vehicle, according to Volkswagen, was to pack a powertrain, four wheels, and a driver into the tiniest car possible. Engineers tucked the wheels beneath the body and smoothed out the car's underbody. The end result stood just 84 cm tall and 110 cm wide, or less than three feet by four feet. 

The vehicle was incredibly light, built from an aluminium frame under a fiberglass and carbon body. Its drag coefficient was an incredible 0,15. 

The ARVW was powered by a version of the Volkswagen Rabbit engine: a 2,4-litre diesel inline-six. Volkswagen added a high-boost turbo-charger and an intercooler, which more than doubled the engine's original output to 130 kW. 

That figure of 130 kW also doesn't seem like much — it's about the output of a modern Honda Civic. But with the lightweight body and extreme dedication to pure aerodynamics, the ARVW was able to hit 353 km/h during its first hour of testing in October 1980. Eventually, it topped out at 360 km/h. 

The first supercar to feature a functioning example of Volkswagen’s unique ‘W’ engine was not the Bugatti Veyron with its quad-turbocharged W16 engine.

With aerodynamic styling penned by Giorgetto Giugiaro of ItalDesign, the W12 Concept Coupe that debuted at the Tokyo International Motor Show in 1997 was, just like the Veyron, an out-and-out supercar. Perhaps even more significantly, it broke the traditional notion that a Volkswagen had to be a regular family car, paving the way for range-topping luxury and performance models from the brand.

The W12 Concept Coupe was powered by a 5,6-litre W12 engine, made by mating two of the company’s compact and lightweight 2,8-litre VR6 engines on a common crankshaft. When married, the W12 made 308 kW, which was channelled through Volkswagen’s Syncro all-wheel drive and a six-speed sequential transmission.

Engine Study W12 Coupé

The W12 was a hit—at least in concept form. Though it never made it to series production, Volkswagen’s first supercar utterly exemplified the term. Its windshield was a single sheet of specially-curved glass that stretched all the way through the end of the roofline, splitting double gullwing doors and blending directly into a glass engine cover that allowed a view of the mighty W12 beneath.  With the flames stoked, a roadster variant was unveiled in 1998 at the Geneva Motor Show.

It would be another three years before reasoning for the earlier prototypes’ existence became clear. In 2001, Volkswagen announced it would attempt to set the 24-hour speed record at the 12,4 km Nardò Ring in southern Italy.



The W12 Concept Coupe seen in auto shows had evolved significantly—the W12 engine was enlarged to 6,0-litre, which, among other mechanical differences, resulted in power leaping to 440 kW and it sprinted from 0 to 100 km/h in just 3,5 seconds.

On the ground in October 2001, the W12 was instantly in its element, clocking an average speed of 293,6 km/h over 7 043 km, shattering the World Record.


https://bit.ly/350b4cc

Wednesday, 8 September 2021

Toyota adds hybrid Corolla and RAV4 to local line up 

Ahead of the launch of the Toyota Corolla Cross that will become the first hybrid model to be manufactured in South Africa, Toyota South Africa is increasing its options with the introduction of the Corolla Hybrid and RAV4 Hybrid. 

In the African context, hybrid is the way to go as a method of ‘greening’ the motoring pasture ahead of a comprehensive roll-out of an electric vehicle charging infrastructure – that also would be dependant on a stable power supply from Eskom. 

In fleet management terms, hybrid makes a strong case considering the wildly escalating price of fuel with potential savings of hundreds of thousands of Rand for larger fleets – although this is somewhat mitigated by the (still way too high) pricing on hybrid derivatives. 

This powertrain technology debuted in 1997 in the Toyota Prius. While the Prius has undoubtedly been the poster child for Hybrid, Toyota has recognised the need to expand this new energy technology to other mainstream model ranges - in pursuit of greater Hybrid adoption and wider market appeal.


 

The Corolla Hybrid

Based on the 11th-generation Corolla sedan, the Corolla Hybrid features Toyota's latest generation 2ZR-FXE engine (shared with the Prius). This 1,8-litre, four-cylinder mill employs Atkinson-cycle technology to deliver a supplementary 53 kW and 163 Nm (at full capacity) – to boost overall system output to 90 kW. 

The Hybrid powertrain also employs a Continuously Variable Transmission (CVT) gearbox - which seamlessly integrates the two drive sources, feeding power to the front wheels. Toyota's latest generation hybrid models utilise a 'starting reduction gear' to improve acceleration from standstill and provide a more direct-drive feeling when taking off. Drivers thus get the comfort and convenience of a 'two-pedal' arrangement while not sacrificing on driveability, performance or fuel economy.   

The Corolla Hybrid is offered in the Xs spec level. This mid-tier grade combines all the key comfort and convenience features while keeping with the Hybrid's more pragmatic bias. 


 

Standard specification includes LED head and taillamps with Daytime Running Lights (DRL) and automatic control, keyless entry, power-adjustable and heated side mirrors and full colour coding. Other cabin niceties Include cruise control, climate control, a reverse camera, power windows all-round, multi-Information display (MID) and three-spoke leather steering wheel with steering switches.  

The audio system comprises a touchscreen audio with Bluetooth, USB and Apple CarPlay/Android Auto functionality, playing through six speakers.  

The Corolla Hybrid rides on bespoke 15-inch alloy wheels, shod with energy-saving 195-65-R15 tyres which boast a low coefficient of friction. 

The Corolla Hybrid offers a claimed average fuel consumption figure of 3,5 l/100 km. CO2 emissions are equally low, registering 81 g/km. Combined with a 43-litre fuel tank, the Corolla Hybrid has a theoretical range of over 1 200 km on a single tank.  

Corolla Xs CVT Hybrid - R 419 900  

A six-services or 90 000 km service plan is standard with service Intervals pegged at 15 000 km / 12- months. Toyota's standard 3-year/100 000 km warranty is included as is an 8-year / 195 000 km Hybrid battery warranty.

 


The RAV4 Hybrid

Based on Toyota's angular 5th-generation sport utility, the RAV4 Hybrid combines a 2,5-litre Hybrid powertrain with the TNGA-based 5-seater SUV. The A25A-FXS engine is shared with other global Toyota and Lexus stablemates, such as the Lexus ES and NX300h and the Camry Hybrid. 

It boasts many of the same technologies shared by the Corolla Hybrid, in a larger displacement four[1]cylinder offering. Featuring an 'undersquare' design with Toyota D-4S port and direct-injection, the Atkinson cycle engine generates 131 kW and 221 Nm in 'ICE' state.

The electric motor punches out 88 kW and 202 Nm (at maximum state of charge) to deliver a total system output of 160 kW. Power is transmitted to the front wheels via a CVT transmission. 

The fuel consumption index is listed at 4,7 l/100 km with CO2 emissions registering 107 g/km.


 

The RAV4 Hybrid is offered in tweaked GX trim  and boasts LED head and tail lamps complete with DRL's up front, rain-sensing wipers, heated and power-operated side mirrors and keyless entry. 

Occupants are catered for with dual-zone climate control, three 12-volt power outlets and multiple cupholders. Driver convenience is boosted by the fitment of Cruise Control, an auto-dimming rear-view mirror, multi-information display and a tilt & telescopic steering wheel finished in leather and incorporating steering switches.   

The infotainment system centres around Toyota's touchscreen interface, delivering sound output through six speakers while interfacing via 3 x USB inputs, Bluetooth and Apple CarPlay/Android Auto mediums. 

Driver support systems include Park Distance Control (PDC), anti-lock braking, EBD, VSC, Trailer Sway Control (TSC), Hill Assist Control (HAC) and Drive Mode Select (Eco/Normal/Power). A full complement of crash bags is present, including side and curtain variants, as well as an anti-theft system.

 


The RAV4 Hybrid rides on 17-inch alloy wheels with 225-65-R17 rubber joined by a full-size spare wheel. Roof rails, a rear spoiler, blue Toyota insignia, Hybrid badging and mud guards also form part of the standard repertoire. 

RAV4 GX Hybrid CVT - R 555 300 

A six-services or 90 000 km service plan is standard with service Intervals pegged at 15 000 km / 12- months. Toyota's standard 3-year/100 000 km warranty is included with an 8-year / 195 000 km Hybrid battery warranty.