The wonder of grenache is that the meagre crops of fruit produced by vines which can be anything up to 100 years old create some of the most vivacious wines around: a stream of soft, mouth-filling juiciness, with flavours of bramble jam, raspberry, cherry, tangy plum and paprika. How all this primary-coloured flavour emerges from such harsh surroundings is a wonder of nature on a par with something from a David Attenborough documentary – like one of those desert plants that lie dormant for years waiting for the briefest rain shower to bring them into bloom.

If there’s a better-value red wine style in the world – a better yield of fruit flavour per pound – than the absurdly underpriced old-vine garnachas of the Campo de Borja region of Aragon in northern Spain, I’ve yet to find it. Wines such as Bodegas Borsao Garnacha 2015 (£5.95, slurp.co.uk) and the Co-op’s Gran Vista Garnacha 2015 (£4.99) have so much more about them than the sweetened alcoholic Ribena that so often passes for wine at the £5 to £6 level these days.

Grenache’s reputation has also suffered more than most at the hands of incautious winemakers: leave it to get too ripe and the abundance of fruit becomes a syrupy, alcoholic jamminess.

When it’s good though, it certainly deserves a place at the top table – indeed, over the past decade,it’s made more strides than any other grape variety, with producers developing a much wider palette. It can provide succulent, spicy easy-drinkers such as Honoro Vera Garnacha 2015 (£8.45, Booths) from another Spanish region, Calatayud, or the always-alluring Yalumba Bush Vine Grenache 2014 (£12, Morrisons) from South Australia. Or it can produce lush winter warmers such as Domaine of the Bee 2011 (£27.50, thesampler.co.uk)

Most interesting of all, however, is the new wave of grenache made in a more restrained style. The prime movers behind this re-imagining of grenache as the “pinot noir of the south” are Spanish, with the likes of Daniel Jiménez-Landi in the hills of Mentrida, Bodegas Joan d’Anguera in Priorat’s neighbour Montsant, and Bodegas Aldonia in Rioja all conjuring subtly earthy, graceful, light-coloured garnachas from very old vines.

There are fine examples, too, in the New World’s new wave. Producers such as Australia’s Jauma, the Ministry of Clouds and Ochota Barrels, and the likes of Craig Hawkins and David Sadie from South Africa’s trendy Swartland set have all contributed to grenache’s more nuanced 21st-century personality in wines that, no matter how gentle they might feel, are still all about the sun.

Six of the best grenaches

Tesco Old Vines Garnacha, Campo de Borja, Spain 2015 (£5, Tesco)
The winemakers of Campo de Borja are blessed with a wealth of old garnacha vines that provide real depth of flavour at absurd prices, like this delightfully exuberant bargain burst of juicy bramble fruit.

Waitrose Southern French Grenache 2015 (£6.49, Waitrose)
Spicy and supple, with a sprinkling of white pepper and dried herbs adding savoury interest to the brisk raspberry and cherry fruit, this is good-value grenache in light, thirst-quenching, bangers-and-mash-matching mode.

Bodegas Aldonia Vendimia Rioja 2015 (£12.50, Vinoteca)
Having been somewhat eclipsed by tempranillo in Rioja, garnacha has made a comeback in recent years. At Aldonia it takes a leading role, joined here by 40% tempanillo in a fluently elegant, red-fruited, super-silky red.

Chris Williams The Foundry Grenache, Stellenbosch, South Africa 2014 (£12.95, the Wine Society)
Talented Cape winemaker Chris Williams’s Rhône-inspired grenache is perfectly pitched, offering a lively succulence of blackberry and raspberry combined with a nip of tannin and hints of peppery spice and wild herb.

Bodegas Jiménez-Landi Las Uvas de la Ira, Castilla y Leon, Spain 2014 (from £21.50, St Andrews Wine Company; the Sampler)
Daniel Jiménez-Landi is one of a handful of Spanish winemakers to pioneer the more sensitive, subtle side of garnacha, using old vines from the Gredos hills of central Spain. So pretty, floral and subtly earthy – it’s garnacha for pinot lovers.

Ochota Barrels The Fugazi Vineyard Grenache, South Australia 2014 (£28.50, Honest Grapes; Handfords; Prohibition Wines)
From a new-wave Australian cellar that puts the emphasis on fresh drinkability, this is a flat-out gorgeous take on grenache with a core of crunchy black and red berries and a streak of peppered-steak bloody-meatiness.